TV rate card daypart/segment which defines the period of the broadcasting day during which the highest rates will be charged. Also used as informal shorthand for evening time.(Note peak audiences for radio are in the morning and the segment is known as 'prime time').
the time of day when it's the highest-usage period. Service providers typically charge full rates during peak time.
Periods of the day with high cellular usage are called peak time. Peak calling times usually coincide with the business day. Generally, rates for airtime are higher during peak times.