1. a member of a legion, especially the French Foreign Legion
2. a member of the American Legion or similar veterans’ organization

Examples

• The French legionnaire served in North Africa for five years.
• Many legionnaires gathered for the annual veterans’ parade.
• He joined the Foreign Legion and became a seasoned legionnaire.
• The American Legion legionnaire spoke about his military service.
• Former legionnaires often share stories of their overseas deployments.
• The legionnaire’s uniform displayed numerous service medals.