—adj. 1. guilty of fleeing the scene of an accident or injury one has caused, esp. a vehicular accident, thereby attempting to evade being identified and held responsible: a hit-and-run driver. 2. involving or resulting from such action or conduct: hit-and-run fatalities. 3. Baseball.pertaining to or noting a play in which, to get a head start, a base runner begins to run to the next base as the pitcher delivers the ball to the batter, who must try to hit it in order to protect the runner.
4. marked by taking flight immediately after a quick, concentrated attack: a hit-and-run raid.
—v.i. Baseball.to attempt or execute a hit-and-run play.