Definition of "prime time" []

• The evening hours, generally between 7 and 11 P.M., when the largest television audience is available. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Erin parked in the massive lot, which was almost full—though it was approaching three in the morning, that was prime time in Party Town."
• "Michael Zellman, a 29-year-old dock worker who wasn't even born when Gilligan was on in prime time between 1964 and 1967, says he's certain Mary Ann did it—despite her nice-girl image."