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ac·tiv·i·ty ( k-t v -t )n. pl. ac·tiv·i·ties 1. The state of being active. 2. Energetic action or movement; liveliness. 3. a. A specified pursuit in which a person partakes. b. An educational process or procedure intended to stimulate learning through actual experience. 4. The intensity of a radioactive source. 5. The ability to take part in a chemical reaction. 6. A physiological process: respiratory activity. |
activity Noun 1. the state of being active 2. lively movement 3. pl -ties any specific action or pursuit: he was engaged in political activities abroad
ThesaurusLegend: Synonyms Related Words Antonyms | Noun | 1. |  activity - any specific behavior; "they avoided all recreational activity"variation, variance - an activity that varies from a norm or standard; "any variation in his routine was immediately reported" space walk - any kind of physical activity outside a spacecraft by one of the crew domesticity - domestic activities or life; "making a hobby of domesticity" operation - the activity of operating something (a machine or business etc.); "her smooth operation of the vehicle gave us a surprisingly comfortable ride" operation - a planned activity involving many people performing various actions; "they organized a rescue operation"; "the biggest police operation in French history"; "running a restaurant is quite an operation"; "consolidate the companies various operations" practice, pattern - a customary way of operation or behavior; "it is their practice to give annual raises"; "they changed their dietary pattern" diversion, recreation - an activity that diverts or amuses or stimulates; "scuba diving is provided as a diversion for tourists"; "for recreation he wrote poetry and solved crossword puzzles"; "drug abuse is often regarded as a form of recreation" cup of tea, dish, bag - an activity that you like or at which you are superior; "chemistry is not my cup of tea"; "his bag now is learning to play golf"; "marriage was scarcely his dish" follow-up, followup - an activity that continues something that has already begun or that repeats something that has already been done game - a contest with rules to determine a winner; "you need four people to play this game" turn, play - (game) the activity of doing something in an agreed succession; "it is my turn"; "it is still my play" music - musical activity (singing or whistling etc.); "his music was his central interest" burst, fit - a sudden flurry of activity (often for no obvious reason); "a burst of applause"; "a fit of housecleaning" work - activity directed toward making or doing something; "she checked several points needing further work" deeds, works - performance of moral or religious acts; "salvation by deeds"; "the reward for good works" service - (law) the acts performed by an English feudal tenant for the benefit of his lord which formed the consideration for the property granted to him occupation - any activity that occupies a person's attention; "he missed the bell in his occupation with the computer game" role - normal or customary activity of a person in a particular social setting; "what is your role on the team?" waste, wastefulness, dissipation - useless or profitless activity; using or expending or consuming thoughtlessly or carelessly; "if the effort brings no compensating gain it is a waste"; "mindless dissipation of natural resources" attempt, effort, try, endeavor, endeavour - earnest and conscientious activity intended to do or accomplish something; "made an effort to cover all the reading material"; "wished him luck in his endeavor"; "she gave it a good try" control - the activity of managing or exerting control over something; "the control of the mob by the police was admirable" protection - the activity of protecting someone or something; "the witnesses demanded police protection" | | 2. | activity - the state of being active; "his sphere of activity"; "he is out of action"state - the way something is with respect to its main attributes; "the current state of knowledge"; "his state of health"; "in a weak financial state" agency - the state of being in action or exerting power; "the agency of providence"; "she has free agency" busyness, hum - the state of being or appearing to be actively engaged in an activity; "they manifested all the busyness of a pack of beavers"; "there is a constant hum of military preparation" behaviour, behavior - the action or reaction of something (as a machine or substance) under specified circumstances; "the behavior of small particles can be studied in experiments" operation - the state of being in effect or being operative; "that rule is no longer in operation" overdrive - the state of high or excessive activity or productivity or concentration; "Troops are ready to go into overdrive as soon as the signal is given"; "Melissa's brain was in overdrive" play - a state in which action is feasible; "the ball was still in play"; "insiders said the company's stock was in play" swing - a state of steady vigorous action that is characteristic of an activity; "the party went with a swing"; "it took time to get into the swing of things" | | 3. | activity - an organic process that takes place in the body; "respiratory activity"control - (physiology) regulation or maintenance of a function or action or reflex etc; "the timing and control of his movements were unimpaired"; "he had lost control of his sphincters" respiration - a single complete act of breathing in and out; "thirty respirations per minute" breath - the process of taking in and expelling air during breathing; "he took a deep breath and dived into the pool"; "he was fighting to his last breath" insemination - the introduction of semen into the genital tract of a female sleeping - the suspension of consciousness and decrease in metabolic rate response, reaction - a bodily process occurring due to the effect of some antecedent stimulus or agent; "a bad reaction to the medicine"; "his responses have slowed with age" crying, tears, weeping - the process of shedding tears (usually accompanied by sobs or other inarticulate sounds); "I hate to hear the crying of a child"; "she was in tears" anastalsis - muscular action of the alimentary tract in a direction opposite to peristalsis healing - the natural process by which the body repairs itself hypostasis - the accumulation of blood in an organ lactation - the production and secretion of milk by the mammary glands overactivity - excessive activity; "overactivity of the sebaceous glands causes the skin to become oily" phagocytosis - process in which phagocytes engulf and digest microorganisms and cellular debris; an important defense against infection pinocytosis - process by which certain cells can engulf and incorporate droplets of fluid tanning - process in which skin pigmentation darkens as a result of exposure to ultraviolet light transpiration - the process of giving off or exhaling water vapor through the skin or mucous membranes | | 4. | activity - (chemistry) the capacity of a substance to take part in a chemical reaction; "catalytic activity"chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions capability, capacity - the susceptibility of something to a particular treatment; "the capability of a metal to be fused" | | 5. |  activity - a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"physical process, process - a sustained phenomenon or one marked by gradual changes through a series of states; "events now in process"; "the process of calcification begins later for boys than for girls" radiation - the spread of a group of organisms into new habitats absorption - (physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium; "the absorption of photons by atoms or molecules" acidification - the process of becoming acid or being converted into an acid adiabatic process - (thermodynamics) any process that occurs without gain or loss of heat aeration - the process of exposing to air (so as to purify); "the aeration of the soil" capture - any process in which an atomic or nuclear system acquires an additional particle capture - a process whereby a star or planet holds an object in its gravitational field centrifugation - the process of separating substances of different densities by the use of a centrifuge chromatography - a process used for separating mixtures by virtue of differences in absorbency concretion - the formation of stonelike objects within a body organ (e.g., the kidneys) condensation - the process of changing from a gaseous to a liquid or solid state convection - (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere decay - the process of gradually becoming inferior desorption - changing from an adsorbed state on a surface to a gaseous or liquid state diffusion - (physics) the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration drift - the gradual departure from an intended course due to external influences (as a ship or plane) ecesis, establishment - (ecology) the process by which a plant or animal becomes established in a new habitat extinction - the reduction of the intensity of radiation as a consequence of absorption and radiation extraction - the process of obtaining something from a mixture or compound by chemical or physical or mechanical means feedback - the process in which part of the output of a system is returned to its input in order to regulate its further output filtration - the process whereby fluids pass through a filter or a filtering medium flocculation - the process of flocculating; forming woolly cloudlike aggregations flow - any uninterrupted stream or discharge formation - natural process that causes something to form; "the formation of gas in the intestine"; "the formation of crystals"; "the formation of pseudopods" fossilisation, fossilization - the process of fossilizing a plant or animal that existed in some earlier age; the process of being turned to stone inactivation - the process of rendering inactive; "the gene inactivation system"; "thermal inactivation of serum samples" ion exchange - a process in which ions are exchanged between a solution and an insoluble (usually resinous) solid; widely used in industrial processing | | 6. | activity - the trait of being active; moving or acting rapidly and energetically; "the level of activity declines with age"trait - a distinguishing feature of your personal nature |
activity noun 1. action, work, life, labour, movement, energy, exercise, spirit, enterprise, motion, bustle, animation, vigour, hustle, exertion, hurly-burly, liveliness, activeness << OPPOSITE inaction noun 2. pursuit, act, project, scheme, task, pleasure, interest, enterprise, undertaking, occupation, hobby, deed, endeavour, pastime, avocation
1. A unit, organization, or installation performing a function or mission, e.g., reception center, redistribution center, naval station, naval shipyard. 2. A function, mission, action, or collection of actions. Also called ACT. See also establishment.
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Activity coefficients
