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Reaction - Meaning, Definition & English Examples

A reaction is a response to an action, event, or stimulus. It can be physical, emotional, or chemical, such as how substances interact or how people behave in response to situations.

reaction

/riˈækʃən/ /riˈækʃən/

Definition:

A response to a stimulus or event, often involving change or behavior.

Synonyms:

response, reply, feedback, counteraction

Part of Speech:

noun

Antonyms:

inaction, indifference

Common Collocations:

chemical reaction, allergic reaction, knee-jerk reaction, chain reaction

Derivatives:

react, reactive, reactor

Usage Tips:

Use "reaction" to describe a response to an action or situation, whether physical, emotional, or chemical.

Common Phrases:

gut reaction, chain reaction, knee-jerk reaction

Etymology:

From Latin "reactio," meaning "a returning," derived from "re-" (back) and "agere" (to do).

Examples:

  • 1. Her reaction to the news was pure joy.
  • 2. The chemical reaction produced a bright flash of light.
  • 3. His quick reaction saved the child from falling.
  • 4. She had an allergic reaction to the medication.

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