The brief interval between the top half of the seventh inning, when the visiting team has finished batting, and the bottom half of the seventh inning, when the home team will bat. The spectators at a baseball game typically stand and stretch during this break, sometimes getting a snack or drink because many stadiums end alcohol sales after this period.
Dating back to baseball's earliest days, the seventh-inning stretch has served as an optimal time to stretch one's legs in preparation for the sometimes tense final innings to follow. Traditionally, this is when "Take Me Out to the Ballgame" has been sung as fans stand. Some teams add other songs to this old-time tune and others replace it altogether. After the 9/11/2001 attacks, many teams adopted the practice of having "God Bless America" sung during the seventh-inning stretch, in addition to or in replacement of "Take Me Out." Other teams have trademark songs for this almost-sacred interval during a game.