ALL meanings of reaction
re·ac·tion
R r - noun reaction person: action as result 1
- noun reaction person: instinctive 1
- noun reaction body to medicine, etc. 1
- noun reaction chemistry 1
- noun reaction a reverse movement or tendency; an action in a reverse direction or manner. 1
- noun reaction movement in the direction of political conservatism or extreme rightism. 1
- noun reaction action in response to some influence, event, etc.: the nation's reaction to the president's speech. 1
- noun reaction Physiology. action in response to a stimulus, as of the system or of a nerve, muscle, etc. 1
- noun reaction Medicine/Medical. the action caused by the resistance to another action. a return to the opposite physical condition, as after shock, exhaustion, or chill. 1
- noun reaction Bacteriology, Immunology. the specific cellular response to foreign matter, as in testing for allergies. 1
- noun reaction Chemistry. the reciprocal action of chemical agents upon each other; chemical change. 1
- noun reaction Also called nuclear reaction. Physics. a process in which a nucleus that is bombarded by a photon, particle, or other nucleus, emits a nucleon, alpha particle, or the like, without a significant change in its atomic weight. 1
- noun reaction Mechanics. the instantaneous response of a system to an applied force, manifested as the exertion of a force equal in magnitude but opposite in direction to the applied force. 1
- noun reaction Commerce. a decline in the market after an advance in prices. 1
- variable noun reaction Your reaction to something that has happened or something that you have experienced is what you feel, say, or do because of it. 0
- countable noun reaction A reaction against something is a way of behaving or doing something that is deliberately different from what has been done before. 0
- singular noun reaction If there is a reaction against something, it becomes unpopular. 0
- noun plural reaction Your reactions are your ability to move quickly in response to something, for example when you are in danger. 0
- uncountable noun reaction Reaction is the belief that the political or social system of your country should not change. 0
- countable noun reaction A chemical reaction is a process in which two substances combine together chemically to form another substance. 0
- countable noun reaction If you have a reaction to a substance such as a drug, or to something you have touched, you are affected unpleasantly or made ill by it. 0
- noun reaction a response to some foregoing action or stimulus 0
- noun reaction the reciprocal action of two things acting together 0
- noun reaction opposition to change, esp political change, or a desire to return to a former condition or system 0
- noun reaction a response indicating a person's feelings or emotional attitude 0
- noun reaction any effect produced by the action of a drug, esp an adverse effect 0
- noun reaction any effect produced by a substance (allergen) to which a person is allergic 0
- noun reaction the simultaneous equal and opposite force that acts on a body whenever it exerts a force on another body 0
- noun reaction a sharp fall in price interrupting a general rise 0
- noun reaction a return or opposing action, force, influence, etc. 0
- noun reaction a response, as to a stimulus or influence 0
- noun reaction a movement back to a former or less advanced condition, stage, etc.; esp., such a movement or tendency in economics or politics; extreme conservatism 0
- noun reaction the mutual action of substances undergoing chemical change 0
- noun reaction a process that involves changes within the nucleus of an atom 0
- noun reaction the state resulting from such changes 0
- noun reaction an action induced by resistance to another action 0
- noun reaction the effect produced by an allergen 0
- noun reaction a depression or exhaustion of energy following nervous tension, overstimulation, etc. 0
- noun reaction an increased activity following depression 0
- noun reaction an organic response to a stimulus 0