To react is to react to something. When you react, you respond to something that has happened.

  • He reacted with anger when he found out that she had lied to him.

  • She reacted with shock when she saw the accident.

Definition of reacting


To act or perform a second time; to do over again; to reenact.


To return an impulse or impression; to resist the action of another body by an opposite force


To act upon each other; to exercise a reciprocal or a reverse effect, as two or more chemical agents; to act in opposition.


To cause chemical agents to react; to cause one chemical agent to react with another.

Nearby Words

reacting Pronunciation in a video

Example Sentences for reacting

  • 1

    But I would react, as I have reacted to a toady.

  • 2

    The Portuguese reacted with derision, and refused.

  • 3

    The WH reacted to the editorial, not the report.

  • 4

    The chair reacts the weight of the person.

  • 5

    The delegation reacted negatively to the plan.

  • 6

    The dog reacted to one of the backpacks.

  • 7

    The ox on the left appears to react to it.

  • 8

    The police reacted nearly instantaneously.

  • 9

    At the first inkling of a genuine issue, they react.

  • 10

    Bianca Maria usually reacted with nonchalance.