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Noun reaction has 7 senses
  1. reaction - a response that reveals a person's feelings or attitude; "he was pleased by the audience's reaction to his performance"; "John feared his mother's reaction when she saw the broken lamp"
    --1 is a kind of     response
    Derived form: verb react1
  2. reaction, response - a bodily process occurring due to the effect of some foregoing stimulus or agent; "a bad reaction to the medicine"; "his responses have slowed with age"
    --2 is a kind of bodily process, body process, bodily function, activity
    --2 has particulars:
     automatism; rebound; overreaction; galvanic skin response, GSR, psychogalvanic response, electrodermal response, electrical skin response, Fere phenomenon, Tarchanoff phenomenon; immune response, immune reaction, immunologic response; tropism; taxis; kinesis; double take; reflex, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction; learned reaction, learned response; passage, passing; answer; transfusion reaction
    Derived form: verb react1
  3. chemical reaction, reaction - (chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water"
    --3 is a kind of chemical process, chemical change, chemical action
    --3 has particulars:
     addition reaction; aldol reaction; chain reaction; chemical equilibrium, equilibrium; decomposition, decomposition reaction; displacement, displacement reaction; double decomposition, double decomposition reaction, metathesis; elimination reaction; endothermic reaction; exothermic reaction; hydrolysis; neutralization, neutralisation, neutralization reaction, neutralisation reaction; oxidation, oxidization, oxidisation; oxidation-reduction, oxidoreduction, redox; photochemical reaction; reduction, reducing; saponification
    Derived form: verb react2
  4. reaction - an idea evoked by some experience; "his reaction to the news was to start planning what to do"
    --4 is a kind of     idea, thought
  5. reaction - doing something in opposition to another way of doing it that you don't like; "his style of painting was a reaction against cubism"
    --5 is a kind of     resistance, opposition
    --5 has particulars: backlash
  6. reaction - extreme conservatism in political or social matters; "the forces of reaction carried the election"
    --6 is a kind of     conservatism, conservativism
  7. reaction - (mechanics) the equal and opposite force that is produced when any force is applied to a body; "every action has an equal and opposite reaction"
    --7 is a kind of     force
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