Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Radio, TV the hours when the largest audience is regularly available; esp., the evening hours
Used by arrangement with John Wiley & Sons, Inc.
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The evening hours, generally between 7 and 11 P.M., when the largest television audience is available.
- primeˈ-timeˈ adjective