Examples of “react” in a Sentence

verb To act, respond, or behave in a particular way because of something that has happened.

• Cats often react badly to loud noises, so keep the room quiet.
• She reacted angrily to the news.
• How did he react when you told him?

verb Of chemical substances, to undergo a transformation when combined with another substance.

• Vinegar reacts with baking soda to make a lot of fizzing bubbles.
• When iron reacts with oxygen and water, it slowly turns to rust.
• Sodium reacts violently with water.

verb To add a small icon or emoji to a social media post to express a feeling about it.

• Click here to react to your friend's photo with a heart.
• Several colleagues reacted to the announcement with a thumbs-up on the group chat.
• Dozens of people reacted to her post with a laughing emoji.