1. a band of cloth or other material worn around the upper arm, typically as a sign of mourning, protest, or identification

Examples

• The mourners wore black armbands at the funeral.
• The captain’s armband identified him as the team leader.
• Protesters wore red armbands during the demonstration.
• The security guard’s armband showed his authority.
• She put on a white armband to show her support for peace.
• The referee wore a distinctive armband during the match.