v.1. To produce something with a succession of light taps: She tapped out a rhythm with her pencil. The captain tapped out a distress signal in Morse code. I tapped the letter out on my computer.
2. To submit in a fight, wrestling match, or other contest by tapping the ground with the hand: Unable to free himself from the choke hold, the wrestler tapped out.
3. Baseball To hit the ball weakly so that one is put out at first base: The batter tapped out, and the inning was over. The hitter tapped out with a ground ball to third base.
4. To deplete some resource or the resources of someone or something: The hurricane tapped out the city's emergency funds. The medical expenses tapped us out. The housing market is tapped out now that so many new houses have been built.