1. to respond to something that has happened or been said
2. to behave in a particular way as a result of or in response to something
3. to undergo a chemical reaction
Usage: chemistry

Examples

• How did she react when you told her the news?
• The audience reacted with loud applause.
• Children often react badly to changes in routine.
• He reacted angrily to the criticism.
• Sodium reacts with water to produce hydrogen gas.
• Some people react to peanuts with severe allergies.
• The stock market reacted positively to the announcement.