1. people who arrive late or stay out late; those who habitually come after the expected or scheduled time
Usage: informal; chiefly British

Examples

• The lateeners missed the opening remarks of the conference.
• The theater staff was used to dealing with lateeners on Friday nights.
• Several lateeners trickled in after the meeting had already started.
• The party host didn't mind the lateeners as long as they brought snacks.