Definitions for reactionriˈæk ʃən

This page provides all possible meanings and translations of the word reaction

Random House Webster's College Dictionary

re•ac•tionriˈæk ʃən(n.)

  1. action in response to some influence, event, etc.:

    the nation's reaction to the president's speech.

  2. a physiological response to an action or condition. a physiological change indicating sensitivity to foreign matter:

    an allergic reaction.

    Category: Medicine

  3. an action in a reverse direction or manner.

  4. a movement toward extreme political conservatism; a desire to return to an earlier system or order.

    Category: Government

  5. the reciprocal action of chemical agents upon each other; chemical change. a process that, unlike a chemical reaction, has the power to change the nucleus of an atom, as radioactive decay, fission, or the like.

    Category: Chemistry

  6. Mech. 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.

    Category: Mechanics

Origin of reaction:

1635–45; on the model of react


Princeton's WordNet

  1. chemical reaction, reaction(noun)

    (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"

  2. reaction(noun)

    an idea evoked by some experience

    "his reaction to the news was to start planning what to do"

  3. reaction, response(noun)

    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"

  4. reaction(noun)

    (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"

  5. reaction(noun)

    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"

  6. reaction(noun)

    extreme conservatism in political or social matters

    "the forces of reaction carried the election"

  7. reaction(noun)

    doing something in opposition to another way of doing it that you don't like

    "his style of painting was a reaction against cubism"

Kernerman English Learner's Dictionary

  1. reaction(noun)ˈæk ʃən

    what sb says or does as a result of sth that happens

    the public's reaction to her speech; The markets dropped in reaction to the news.; Her immediate reaction was to walk out.

  2. reactionˈæk ʃən

    an action done in opposition to

    a new generation's reaction against the spending habits of their parents

  3. reactionˈæk ʃən

    a change in the body as a response to a food, medicine, or other substance

    an allergic reaction to strawberries; harmful reactions to the drug

  4. reactionˈæk ʃən

    sb's ability to act quickly in response

    I tried to grab him but my reactions were too slow.

  5. reactionˈæk ʃən

    a chemical change that occurs when two or more substances are mixed

    Gas is given off as the reaction occurs.


  1. reaction(Noun)

    An action or statement in response to a stimulus or other event

  2. reaction(Noun)

    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. Origin: reaction, from reactio, from the verb reago, from re- + ago. More at English re-, action.

Webster Dictionary

  1. Reaction(noun)

    any action in resisting other action or force; counter tendency; movement in a contrary direction; reverse action

  2. Reaction(noun)

    the mutual or reciprocal action of chemical agents upon each other, or the action upon such chemical agents of some form of energy, as heat, light, or electricity, resulting in a chemical change in one or more of these agents, with the production of new compounds or the manifestation of distinctive characters. See Blowpipe reaction, Flame reaction, under Blowpipe, and Flame

  3. Reaction(noun)

    an action induced by vital resistance to some other action; depression or exhaustion of vital force consequent on overexertion or overstimulation; heightened activity and overaction succeeding depression or shock

  4. Reaction(noun)

    the force which a body subjected to the action of a force from another body exerts upon the latter body in the opposite direction

  5. Reaction(noun)

    backward tendency or movement after revolution, reform, or great progress in any direction


  1. Reaction

    Reaction is the second album by American R&B singer Rebbie Jackson. The album released in 1986 and spawned two mildly successful singles, "Reaction" and "You Send the Rain Away", a duet with Robin Zander. "Ticket To Love" was going to be released as the second single and received a very limited promo release before being cancelled in favour of "You Send the Rain Away". The album-only track "Tonight I'm Yours", a duet with Isaac Hayes received substantial airplay but was not commercially released as a single. Reaction received a limited CD reissue in Japan in the early 1990s. Reaction was reissued on CD with Jackson's previous album Centipede on May 18, 2010. The album was reissued by Funky Town Grooves on CD in October 2012 and included 7 bonus tracks.

British National Corpus

  1. Spoken Corpus Frequency

    Rank popularity for the word 'reaction' in Spoken Corpus Frequency: #1866

  2. Written Corpus Frequency

    Rank popularity for the word 'reaction' in Written Corpus Frequency: #2337

  3. Nouns Frequency

    Rank popularity for the word 'reaction' in Nouns Frequency: #616

Anagrams of reaction

  1. creation

  2. anticore

  3. actioner

Translations for reaction

Kernerman English Multilingual Dictionary


the act of reacting

What was his reaction to your remarks?; I get a bad reaction from penicillin; I'd like to ask you for your reactions to these suggestions.

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