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  1. Dictionary
    reaction
    /rɪˈakʃn/

    noun

    • 1. something done, felt, or thought in response to a situation or event: "my immediate reaction was one of relief" Similar responseanswerreplyrejoinder
    • 2. a chemical process in which substances act mutually on each other and are changed into different substances, or one substance changes into other substances: "a chemical reaction caused by a build-up of particular sodium salts"

    More definitions, origin and scrabble points

  2. REACTION definition: 1. behaviour, a feeling or an action that is a direct result of something else: 2. someone's…. Learn more.

  3. noun. re· ac· tion rē-ˈak-shən. Synonyms of reaction. 1. a. : the act or process or an instance of reacting. b. : resistance or opposition to a force, influence, or movement. especially : tendency toward a former and usually outmoded political or social order or policy. 2. : a response to some treatment, situation, or stimulus.

  4. Your reaction to something that has happened or something that you have experienced is what you feel, say, or do because of it.

  5. Reaction definition: a reverse movement or tendency; an action in a reverse direction or manner.. See examples of REACTION used in a sentence.

  6. [plural] the ability to move quickly in response to something, especially if in danger.

  7. A reaction is an action taken in response to something. If you're telling your parents that you want to move out, you'll see by their reaction that they're sad about it. A reaction is often a physical in nature. A chemical reaction describes the way a chemical behaves when combined with another substance.

  8. Define reaction. reaction synonyms, reaction pronunciation, reaction translation, English dictionary definition of reaction. n. 1. a. A response to a stimulus. b. The state resulting from such a response. 2. A reverse or opposing action. 3. a. A tendency to revert to a former...

  9. REACTION meaning: 1. something you say, feel, or do because of something that has happened: 2. the ability to move…. Learn more.

  10. 1. : to exert a reciprocal or counteracting force or influenceoften used with on or upon. 2. : to change in response to a stimulus. 3. : to act in opposition to a force or influence usually used with against. 4. : to move or tend in a reverse direction. 5. : to undergo chemical reaction. transitive verb. : to cause to react. Synonyms. reply.

  11. Your reaction to something that has happened or something that you have experienced is what you feel, say, or do because of it.