reaction

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See also: réaction and reäction

English

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Alternative forms

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Etymology

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    Inherited from Middle English reaccion, from Old French reaction, from Latin reāctiō, from the verb reagō, from re- (“again”) + agō (“to act”); more at re-, action; equivalent to react +‎ -ion.

    Pronunciation

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    • Audio (US):(file)
    • IPA(key): /ɹiˈækʃən/
    • Rhymes: -ækʃən

    Noun

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    reaction (plural reactions)

    1. An action or statement in response to a stimulus or other event.
      The announcement of the verdict brought a violent reaction.
      You were in the courtroom. What is your reaction?
      When I last tried to eat strawberries I had a terrible allergic reaction.
    2. (chemistry) A transformation in which one or more substances is converted into another by combination or decomposition.
      In this reaction, the acid and base will neutralize each other, producing a salt.
    3. (politics) Reactionary politics; a period in which reactionary thought or politics is resurgent or dominant.
    4. (Misesian praxeology, Austrian economics) Unpurposeful behavior.
    5. (Internet) An icon or emoji appended to a posted message by a user to express their feeling about it.

    Synonyms

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    • reax (journalism jargon)
    • rxn (abbreviation)

    Derived terms

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    Translations

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    Anagrams

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    Interlingua

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    Noun

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    reaction (plural reactiones)

    1. reaction
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