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1. The act of defending against attack, danger, or injury.
2. A means or method of defending or protecting.
3. Sports The act or an instance of defending a championship against a challenger: will box in his third defense of his title.
4. An argument in support or justification of something. See Synonyms at apology.
5. Law
a. The act of defending a case.
b. A fact or law that provides a full or partial exoneration of the defendant against the charges or claims made in a lawsuit or prosecution.
c. The defendant and his or her legal counsel.
6. The science or art of defending oneself; self-defense.
7. (often dē′fĕns′) Sports
a. The means or tactics used in trying to stop the opposition from scoring.
b. The team or those players on the team attempting to stop the opposition from scoring.
c. Defending ability or potential.
8. The military, governmental, and industrial complex, especially as it authorizes and manages weaponry production.
tr.v. de·fensed, de·fens·ing, de·fens·es Sports
1. To attempt to stop (the opposition) from scoring.
2. To play defense against (an opponent or play).

[Middle English, from Old French, from Latin dēfēnsa, from feminine past participle of dēfendere, to ward off; see defend.]

de·fense′less adj.
de·fense′less·ly adv.
de·fense′less·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(dɪˈfɛns or, esp. for 7,9, ˈdi fɛns)

n., v. -fensed, -fens•ing. n.
1. resistance against attack; protection.
2. something that defends, as a fortification or medication.
3. the defending of a cause or the like by speech, etc.: to speak in defense of a cause.
4. the arms production of a nation: spending billions on defense.
5. a speech, etc., in vindication.
a. the defendant's answer to the charge or claim made by the plaintiff.
b. the strategy adopted by a defendant for defending against the plaintiff's charge.
c. a defendant together with counsel.
a. the tactics of defending oneself or one's goal against attack.
b. the team attempting to thwart the attack of the team having the ball or puck.
c. the players of such a team or their positions.
9. to defend against (an opponent, play, etc.).
[1250–1300; Middle English < Old French < Late Latin dēfēnsa a forbidding, derivative of Latin dēfendere to defend]
de•fense′less, adj.
de•fense′less•ness, n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.defense - (military) military action or resources protecting a country against potential enemies; "they died in the defense of Stalingrad"; "they were developed for the defense program"
umbrella - a formation of military planes maintained over ground operations or targets; "an air umbrella over England"
military action, action - a military engagement; "he saw action in Korea"
air defense - defensive measures designed to destroy attacking enemy aircraft or missiles or to nullify their effectiveness
stand - a defensive effort; "the army made a final stand at the Rhone"
hasty defence, hasty defense - a defense organized while in contact with the enemy or when time is limited
deliberate defence, deliberate defense - a defense organized before contact is made with the enemy and while time for organization is available; usually includes a fortified zone (with pillboxes) and communication systems
biodefence, biodefense, biological defence, biological defense - procedures involved in taking defensive measures against attacks using biological agents
chemical defence, chemical defense - procedures involved in taking defensive measures against attacks using chemical agents
minelaying, mining - laying explosive mines in concealed places to destroy enemy personnel and equipment
armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"
2.defense - protection from harm; "sanitation is the best defense against disease"
protection - the activity of protecting someone or something; "the witnesses demanded police protection"
3.defense - (sports) the team that is trying to prevent the other team from scoringdefense - (sports) the team that is trying to prevent the other team from scoring; "his teams are always good on defense"
athletics, sport - an active diversion requiring physical exertion and competition
team, squad - a cooperative unit (especially in sports)
offence, offense - the team that has the ball (or puck) and is trying to score
4.defense - the justification for some act or belief; "he offered a persuasive defense of the theory"
justification - a statement in explanation of some action or belief
apologia, apology - a formal written defense of something you believe in strongly
alibi - (law) a defense by an accused person purporting to show that he or she could not have committed the crime in question
exculpation, excuse, self-justification, alibi - a defense of some offensive behavior or some failure to keep a promise etc.; "he kept finding excuses to stay"; "every day he had a new alibi for not getting a job"; "his transparent self-justification was unacceptable"
5.defense - (psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires
unconscious process, process - a mental process that you are not directly aware of; "the process of denial"
psychiatry, psychological medicine, psychopathology - the branch of medicine dealing with the diagnosis and treatment of mental disorders
compensation - (psychiatry) a defense mechanism that conceals your undesirable shortcomings by exaggerating desirable behaviors
conversion - (psychiatry) a defense mechanism represses emotional conflicts which are then converted into physical symptoms that have no organic basis
denial - (psychiatry) a defense mechanism that denies painful thoughts
displacement - (psychiatry) a defense mechanism that transfers affect or reaction from the original object to some more acceptable one
idealisation, idealization - (psychiatry) a defense mechanism that splits something you are ambivalent about into two representations--one good and one bad
intellectualisation, intellectualization - (psychiatry) a defense mechanism that uses reasoning to block out emotional stress and conflict
isolation - (psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it
projection - (psychiatry) a defense mechanism by which your own traits and emotions are attributed to someone else
psychoanalytic process - a process that is assumed to occur in psychoanalytic theory
rationalisation, rationalization - (psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening
reaction formation - (psychiatry) a defense mechanism in which a person unconsciously develops attitudes and behavior that are the opposite of unacceptable repressed desires and impulses and serve to conceal them; "his strict morality is just a reaction formation to hide his sexual drive"
regression - (psychiatry) a defense mechanism in which you flee from reality by assuming a more infantile state
repression - (psychiatry) the classical defense mechanism that protects you from impulses or ideas that would cause anxiety by preventing them from becoming conscious
6.defense - the federal department responsible for safeguarding national security of the United StatesDefense - the federal department responsible for safeguarding national security of the United States; created in 1947
executive department - a federal department in the executive branch of the government of the United States
DARPA, Defense Advanced Research Projects Agency - the central research and development organization for the United States Department of Defense; responsible for developing new surveillance technologies since 9/11
Department of Defense Laboratory System, LABLINK - a defense laboratory that provides essential services in fundamental science for national security and environmental protection and provides technologies that contribute to industrial competitiveness
United States Navy, US Navy, USN, Navy - the navy of the United States of America; the agency that maintains and trains and equips combat-ready naval forces
U. S. Air Force, United States Air Force, US Air Force, USAF, Air Force - the airforce of the United States of America; the agency that defends the United States through control and exploitation of air and space
Defense Intelligence Agency, DIA - an intelligence agency of the United States in the Department of Defense; is responsible for providing intelligence in support of military planning and operations and weapons acquisition
Defense Logistics Agency - a logistics combat support agency in the Department of Defense; provides worldwide support for military missions
Defense Technical Information Center, DTIC - the agency in the Department of Defense that provides scientific and technical information to federal agencies and their contractors
National Reconnaissance Office, NRO - an intelligence agency in the United States Department of Defense that designs and builds and operates space reconnaissance systems to detect trouble spots worldwide and to monitor arms control agreements and environmental issues and to help plan military operations
National Security Agency, NSA - the United States cryptologic organization that coordinates and directs highly specialized activities to protect United States information systems and to produce foreign intelligence information
U. S. Army, United States Army, US Army, USA, Army - the army of the United States of America; the agency that organizes and trains soldiers for land warfare
Ballistic Missile Defense Organization, BMDO - an agency in the Department of Defense that is responsible for making ballistic missile defense a reality
Defense Information Systems Agency, DISA - a combat support agency in the Department of Defense responsible for developing and operating and supporting information systems to serve the needs of the President and the Secretary of Defense and the Joint Chiefs of Staff
National Geospatial-Intelligence Agency, NGA - a combat support agency that provides geographic intelligence in support of national security
Casualty Care Research Center, CCRC - an agency in the Department of Defense that is a national center for research on all aspects of injury control and casualty care
7.defense - the defendant and his legal advisors collectively; "the defense called for a mistrial"
aggregation, collection, accumulation, assemblage - several things grouped together or considered as a whole
prosecution - the lawyers acting for the state to put the case against the defendant
8.defense - the speech act of answering an attack on your assertions; "his refutation of the charges was short and persuasive"; "in defense he said the other man started it"
answer - the speech act of replying to a question
confutation - the speech act of refuting conclusively
rebuttal - the speech act of refuting by offering a contrary contention or argument
9.defense - an organization of defenders that provides resistance against attackdefense - an organization of defenders that provides resistance against attack; "he joined the defense against invasion"
organization, organisation - a group of people who work together
bastion - a group that defends a principle; "a bastion against corruption"; "the last bastion of communism"
10.defense - a structure used to defend against attack; "the artillery battered down the defenses"
cheval-de-frise, chevaux-de-frise - defensive structure consisting of a movable obstacle composed of barbed wire or spikes attached to a wooden frame; used to obstruct cavalry
fortification, munition - defensive structure consisting of walls or mounds built around a stronghold to strengthen it
fortress, fort - a fortified defensive structure
line of defence, line of defense - defensive structure consisting of a barrier that can be employed for defense against attack
outwork - subsidiary defensive structure lying outside the main fortified area; "the outworks of the castle"
stronghold, fastness - a strongly fortified defensive structure
structure, construction - a thing constructed; a complex entity constructed of many parts; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"
11.defense - a defendant's answer or plea denying the truth of the charges against him; "he gave evidence for the defense"
due process, due process of law - (law) the administration of justice according to established rules and principles; based on the principle that a person cannot be deprived of life or liberty or property without appropriate legal procedures and safeguards
trial - (law) the determination of a person's innocence or guilt by due process of law; "he had a fair trial and the jury found him guilty"; "most of these complaints are settled before they go to trial"
entrapment - a defense that claims the defendant would not have broken the law if not tricked into doing it by law enforcement officials
law, jurisprudence - the collection of rules imposed by authority; "civilization presupposes respect for the law"; "the great problem for jurisprudence to allow freedom while enforcing order"
criminal prosecution, prosecution - the institution and conduct of legal proceedings against a defendant for criminal behavior
12.defense - the act of defending someone or something against attack or injury; "a good boxer needs a good defense"; "defense against hurricanes is an urgent problem"
protection - the activity of protecting someone or something; "the witnesses demanded police protection"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


1. The act or a means of defending:
2. A statement that justifies or defends something, such as a past action or policy:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
sự phòng thủ


(diˈfens) (American) defense noun
1. the act or action of defending against attack. the defence of Rome; He spoke in defence of the plans.
2. the method or equipment used to guard or protect. The walls will act as a defence against flooding.
3. a person's answer to an accusation especially in a law-court. What is your defence?
deˈfenceless adjective
helpless or without protection.
the defence
the case on behalf of a person who is accused in a law court. the counsel for the defence.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.


دِفَاع obrana forsvar Verteidigung άμυνα defensa puolustus défense obrana difesa 防御 수비 verdediging forsvar obrona defesa защита försvar การป้องกัน savunma sự phòng thủ 防守
Multilingual Translator © HarperCollins Publishers 2009


n. defensa; protección; resistencia;
___ mechanismmecanismo de ___; [organic] antitoxina
English-Spanish Medical Dictionary © Farlex 2012


n defensa
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in classic literature ?
With what color of propriety could the force necessary for defense be limited by those who cannot limit the force of offense?
The attempt has awakened fully the public attention to that important subject; and has led to investigations which must terminate in a thorough and universal conviction, not only that the constitution has provided the most effectual guards against danger from that quarter, but that nothing short of a Constitution fully adequate to the national defense and the preservation of the Union, can save America from as many standing armies as it may be split into States or Confederacies, and from such a progressive augmentation, of these establishments in each, as will render them as burdensome to the properties and ominous to the liberties of the people, as any establishment that can become necessary, under a united and efficient government, must be tolerable to the former and safe to the latter.
The power of levying and borrowing money, being the sinew of that which is to be exerted in the national defense, is properly thrown into the same class with it.
That situation consists in the best possible state of defense, and necessarily depends on the government, the arms, and the resources of the country.
It can apply the resources and power of the whole to the defense of any particular part, and that more easily and expeditiously than State governments or separate confederacies can possibly do, for want of concert and unity of system.
If one was attacked, would the others fly to its succor, and spend their blood and money in its defense? Would there be no danger of their being flattered into neutrality by its specious promises, or seduced by a too great fondness for peace to decline hazarding their tranquillity and present safety for the sake of neighbors, of whom perhaps they have been jealous, and whose importance they are content to see diminished?
The closing questions put to the under-housemaid and the nurse revealed for the first time what the nature of the defense was to be.
Here, then, in spite of the negative answers, was the plan of the defense made dimly visible for the first time to the jury and to the audience.
"That is what we say, my lord, and what we propose to prove as the foundation of the defense. We cannot dispute the medical evidence which declares that Mrs.
They would endeavor to supply the inferiority of population and resources by a more regular and effective system of defense, by disciplined troops, and by fortifications.
These armies being, in the first case, rarely, if at all, called into activity for interior defense, the people are in no danger of being broken to military subordination.
A YOUNG FAWN once said to his Mother, "You are larger than a dog, and swifter, and more used to running, and you have your horns as a defense; why, then, O Mother!

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