1. to react with less emotion, concern, or response than is appropriate or expected for a situation

Examples

• The mayor seemed to underreact to the crisis, offering only a brief statement.
• Don’t underreact to this opportunity – it could change your career.
• She tends to underreact to compliments, never seeming excited about praise.
• The team underreacted to their victory, showing little celebration.
• Critics said the government underreacted to the environmental disaster.
• He has a tendency to underreact in emergencies, staying unusually calm.