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Meaning & Definition of Reaction in English

English

Reaction

/riækʃən/

noun

1. (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"
    synonym:
  • chemical reaction
  • ,
  • reaction

2. An idea evoked by some experience

  • "His reaction to the news was to start planning what to do"
    synonym:
  • reaction

3. 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"
    synonym:
  • reaction
  • ,
  • response

4. (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"
    synonym:
  • reaction

5. 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"
    synonym:
  • reaction

6. Extreme conservatism in political or social matters

  • "The forces of reaction carried the election"
    synonym:
  • reaction

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

  • "His style of painting was a reaction against cubism"
    synonym:
  • reaction

Examples of using

You should've heard the family's reaction when I told them the good news.
It's completely impossible to foretell his reaction.
Observe his facial reaction when we mention a price.