prime time definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Radio, TV the hours when the largest audience is regularly available; esp., the evening hours
prime time definition by American Heritage Dictionary
The evening hours, generally between 7 and 11 P.M., when the largest television audience is available.
- primeˈ-timeˈ adjective