/ˈbeɪslaɪn ||; ˈbesˌlaɪn/noun[usu.sing] 1 (sport体育) a line that marks each end of the court in games such as tennis or the edge of the area where a player can run in baseball (网球场的)底线;(棒球场的)垒线
2 (technical术语) a line or measurement that is used as a starting-point when comparing facts (用作比较的)基线