1. people who sit next to each other, especially on an airplane, bus, or in a classroom
Usage: plural form of seatmate

Examples

• The flight attendant asked the seatmates to keep their voices down.
• My seatmates on the bus were very friendly and talkative.
• The teacher assigned new seatmates for the semester.
• The two seatmates shared snacks during the long journey.
• She became good friends with her seatmates in chemistry class.
• The seatmates helped each other with their luggage.