1 N-COUNT (高尔夫球、网球等运动中的)大力球手 A big hitter is a sportsperson such as a golfer or tennis player who hits the ball with a lot of force. (高尔夫球、网球等运动中的)大力球手
2 N-COUNT (尤指商业或政治领域的)大人物,风云人物 A big hitter is a powerful or influential person, especially in business or politics. (尤指商业或政治领域的)大人物,风云人物 [informal]