(in baseball )棒球 the third of the four positions that players must reach in order to score points; the position of the player on the defending team near third base The runner was called out when he took his foot off third base. 跑者离开三垒时被叫出。 The team isn't certain what it will do about third base. 球队不确定三垒将做什么。 As a kid, I couldn't wait to grow up and play third base for the Brooklyn Dodgers. 小时候,我迫不及待地想要成长为布鲁克林道奇队的三垒手。