1. the act of making thoughts or feelings known through words, actions, or artistic work
2. a look on someone’s face that shows emotion or feeling
3. a word or phrase, especially one with a particular meaning

Examples

• Art is a form of creative expression.
• Her facial expression showed confusion.
• The expression ‘break a leg’ means good luck.
• The teacher wrote the algebraic expression on the board.
• The pianist’s expression brought the music to life.
• Freedom of expression is protected by the Constitution.
• His expression darkened when he heard the news.