out
in baseball, when the fielding team effects any of several events, and the umpire rules a batter or baserunner ineligible to advance
fourth out
out in baseball, possible only in the same play as a third out
strikeout
in baseball, an out called due to three strikes in an at-bat
tag out
in baseball, and out achieved by tagging a runner between bases with a live ball or the hand or glove holding it