noun.
The halftime show, the primary "light" entertainment of a game, after the second quarter when players can physically recover, coaches can berate players with a pep talk, bets can be doubled, etc.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
an intermission between the first and second half of a game
adverb.
for less than the standard number of hours
adjective.
involving half the standard or customary time for an activity
Word Usage
"Dole Campaign America '96: The View from the Couch, which covered how the campaign was covered, and I don't recall any of the hundreds of commentators I heard ever using the term "halftime" that way."