a defensive football player who takes a position close behind the linemen
(American football) the position of a defensive football player who plays close behind the line of scrimmage
例句
A new or substitute offensive play called by the quarterback or a defensive formation called by a linebacker at the line of scrimmage as an adjustment to the opposing side's formation.改变打法一种在橄榄球争球线上作为就对方阵势的调整,由四分卫发令的新的或替代进攻打法,或由后卫发令的防守阵势