to lose sth or have sth taken away from you because you have done sth wrong （因犯错）丧失，被没收◆If you cancel your flight, you will forfeit your deposit. 乘客若取消航班订位，订金概不退还。
to agree not to receive sth that you have a right to 同意放弃◆She forfeited her salary for an extended period of leave. 她同意不带薪延长休假。