1. a person who pays to live and eat meals at someone else’s house or at a boarding school
2. a person who gets on or enters a ship, aircraft, or other vehicle

Examples

• The family took in three boarders to help pay the mortgage.
• As a boarder at the prep school, she lived in the dormitory during the week.
• The elderly woman rented rooms to boarders who needed affordable housing.
• All boarders must be seated before the plane can take off.
• The ship’s crew helped the boarders find their cabins.
• New boarders at the school attended an orientation meeting.
• The boarding house provided meals for all its boarders.