prime time

noun Radio and Television.
the hours, generally between 8 and 11 p.m., usually having the largest audience of the day.

1955–60 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
prime time
1.  the peak viewing time on television, for which advertising rates are the highest
2.  occurring during or designed for prime time: a primetime drama

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Computing Dictionary

prime time definition

(From TV programming) Normal high-usage hours on a time-sharing system; the day shift. Avoidance of prime time was traditionally given as a major reason for night mode hacking. The rise of the personal workstation has rendered this term, along with time-sharing itself, almost obsolete. The hackish tendency to late-night hacking runs has changed not a bit.
[Jargon File]
The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
The major television networks now devote an hour of early prime time to this sort of drivel.
Summer is the prime time to make this drive, though spring and fall can also be pleasant.
The non-windows systems aren't ready for prime time in incident management either.
Find out what's worth watching, or what may not be, in prime time.
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