[] to get rid of sth/sb that you no longer need or want摆脱；除掉；处理掉◆They jettisoned 217 staff when the recession hit.他们因经济衰退的打击辞掉了 217 位员工。to reject an idea, a belief, a plan, etc. that you no longer think is useful or likely to be successful放弃，拒绝接受（想法、信念、计划等）