ˌoff-ˈpeak adjective especially British English

1. off-peak hours or periods are times that are less busy because fewer people want to do or use something Antonym : peak:
Telephone charges are lower during off-peak periods.

2. off-peak travel, electricity etc is cheaper because it is done or used at less busy times Antonym : peak
—off-peak adverb

[TahlilGaran] Dictionary of Contemporary English ▲