1. gave something to someone and received something in return
2. replaced one thing with another; substituted
3. shared or expressed mutually (as in conversation, glances, or ideas)

Examples

• The two friends exchanged phone numbers at the party.
• I exchanged my old laptop for a new one at the store.
• The couple exchanged vows during the wedding ceremony.
• We exchanged gifts on Christmas morning.
• The students exchanged ideas during the group discussion.
• She exchanged dollars for euros at the bank before her trip.