n.a baseball player on the team at bat who is on base (or attempting to reach a base)
同义词：base runnerrunner
base-runner例句
baserunner’s optimal path - Dr Michael Kerckhove Baserunner’s Optimal Path Baseball rules corner: interference by a base runner is a no-no in the rules book. Baseball game with disengageable base runner pegs Baserunner's Optimal Path Base Runner's Collision With Softball Catcher Results in Suit Maverick Base Runner BEST BASERUNNER Take off like a baserunner to poach Michigan base runner, Michigan Inv. 1991
