From Longman Dictionary of Contemporary Englishoff-peakˌoff-ˈpeak adjective especially British English 1 BUSY PLACEoff-peak hours or periods are times that are less busy because fewer people want to do or use something OPP peak Telephone charges are lower during off-peak periods.2 BUSY PLACEoff-peak travel, electricity etc is cheaper because it is done or used at less busy times OPP peak —off-peak adverb
Examples from the Corpus
off-peak• Public opinion sometimes erroneously accuses the partly empty, off-peak buses of being run inefficiently.• It's not expensive if you couple it to an off-peak Economy Seven meter.• Check whether an off-peak electric storage heater or a gas fire might be better choice.• Consumers can benefit because the heaters then use more of the cheaper off-peak electricity, and less of the expensive kind.• Work on the highway will be done only during off-peak hours.• During the summer off-peak months a proportion of gas is fed into storage units above and below ground.• Take advantage of off-peak reductions for package holidays.• Peak-hour trams will run every six minutes, with off-peak services every 12 minutes.• Many do not take full advantage of the various daytime, night and off-peak tariffs on offer from their electricity company.• At off-peak times senior citizens can use the sports centre at reduced rates.• Youngsters and the unemployed will be given 250 hours of free community use at off-peak times.off-peak periods• In particular, fare increases appear to lead to high losses of passengers, particularly at off-peak periods.From Longman Business Dictionaryoff-peakˌoff-ˈpeak adjective [only before a noun]1TRAVELoff-peak travel, electricity etc is cheaper than normal because fewer people are travelling, using electricity etc at that timediscounts on off-peak travel2COMMERCEoff-peak hours or periods are the times when fewer people want to do or use something, and when it is usually cheaperTelephone charges are lower during off-peak periods. → compare peak2 —off-peak adverbIt is much cheaper to travel off-peak. 