au·to·mat·ic
(ô′tə-măt′ĭk)adj.1. a. Acting or operating in a manner essentially independent of external influence or control: an automatic light switch; a budget deficit that triggered automatic spending cuts.
b. Self-regulating: an automatic washing machine.
2. a. Acting or done without volition or conscious control; involuntary: automatic shrinking of the pupils of the eyes in strong light.
b. Acting or done as if by machine; mechanical: an automatic reply to a familiar question.
3. a. Capable of firing continuously until ammunition is exhausted or the trigger is released: an automatic rifle.
b. Semiautomatic: an automatic pistol.
n.1. An automatic machine or device.
2. a. An automatic firearm.
b. A semiautomatic firearm.
3. A transmission or a motor vehicle with an automatic gear-shifting mechanism.
Idiom: on automatic Functioning by or as if by automatic machine or device.
au′to·mat′i·cal·ly adv.
au′to·ma·tic′i·ty (-mə-tĭs′ĭ-tē) 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.
automatic
(ˌɔːtəˈmætɪk) adj1. performed from force of habit or without conscious thought; lacking spontaneity; mechanical: an automatic smile.
2. (General Engineering)
a. (of a device, mechanism, etc) able to activate, move, or regulate itself
b. (of an act or process) performed by such automatic equipment
3. (Physiology) (of the action of a muscle, gland, etc) involuntary or reflex
4. occurring as a necessary consequence: promotion is automatic after a year.
5. (Firearms, Gunnery, Ordnance & Artillery) (of a firearm)
a. utilizing some of the force of or gas from each explosion to eject the empty shell case, replace it with a new one, and fire continuously until release of the trigger. Compare
semiautomatic2 n6. (Firearms, Gunnery, Ordnance & Artillery) an automatic firearm
7. (Automotive Engineering) a motor vehicle having automatic transmission
8. (General Engineering) a machine that operates automatically
[C18: from Greek automatos acting independently]
ˌautoˈmatically adv
automaticity n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
au•to•mat•ic
(ˌɔ təˈmæt ɪk)
adj. 1. having the capability of starting, operating, moving, etc., independently: an automatic sprinkler system.
2. occurring independently of volition, as certain muscular actions; involuntary; reflex.
3. done unconsciously or from force of habit; mechanical.
4. occurring spontaneously.
5. (of a firearm) utilizing the recoil or part of the force of the explosive to eject the spent cartridge shell, introduce a new cartridge, cock the arm, and fire it repeatedly.
n. 6. a machine or device that operates automatically.
7. an automatic pistol or rifle.
8. an automobile equipped with automatic transmission.
Idioms: on automatic, being operated or controlled by or as if by an automatic device.
[1740–50; < Greek
autómat(os) self-acting (see
automaton) +
-ic]
au`to•mat′i•cal•ly, adv.
au`to•ma•tic′i•ty (-məˈtɪs ɪ ti) n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.