English dictionary



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English noun: reaction

1. reaction (process) (chemistry) a process in which one or more substances are changed into others


SamplesThere was a chemical reaction of the lime with the ground water.


Synonymschemical reaction


Broader (hypernym)chemical action, chemical change, chemical process


Narrower (hyponym)addition reaction, aldol reaction, chain reaction, chemical decomposition reaction, chemical equilibrium, decomposition, decomposition reaction, displacement, displacement reaction, double decomposition, double decomposition reaction, elimination reaction, endothermic reaction, equilibrium, exothermic reaction, hydrolysis, metathesis, neutralisation, neutralisation reaction, neutralization, neutralization reaction, oxidation, oxidation-reduction, oxidisation, oxidization, oxidoreduction, photochemical reaction, redox, reducing, reduction, saponification


Domain categorychemical science, chemistry

2. reaction (cognition) an idea evoked by some experience


SamplesHis reaction to the news was to start planning what to do.


Broader (hypernym)idea, thought

3. reaction (act) a bodily process occurring due to the effect of some antecedent stimulus or agent


SamplesA bad reaction to the medicine.
His responses have slowed with age.


Synonymsresponse


Broader (hypernym)activity, bodily function, bodily process, body process


Narrower (hyponym)answer, automatism, double take, electrical skin response, electrodermal response, Fere phenomenon, galvanic skin response, GSR, immune reaction, immune response, immunologic response, inborn reflex, innate reflex, instinctive reflex, kinesis, learned reaction, learned response, overreaction, passage, passing, physiological reaction, psychogalvanic response, rebound, reflex, reflex action, reflex response, Tarchanoff phenomenon, taxis, transfusion reaction, tropism, unconditioned reflex

4. reaction (phenomenon) (mechanics) the equal and opposite force that is produced when any force is applied to a body


SamplesEvery action has an equal and opposite reaction.


Broader (hypernym)force


Domain categorymechanics

5. reaction (phenomenon) a response that reveals a person's feelings or attitude


SamplesHe was pleased by the audience's reaction to his performance.
John feared his mother's reaction when she saw the broken lamp.


Broader (hypernym)response

6. reaction (cognition) extreme conservatism in political or social matters


SamplesThe forces of reaction carried the election.


Broader (hypernym)conservatism, conservativism

7. reaction (act) doing something in opposition to another way of doing it that you don't like


SamplesHis style of painting was a reaction against cubism.


Broader (hypernym)opposition, resistance


Narrower (hyponym)backlash









Based on WordNet 3.0 copyright © Princeton University.
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