◎ 自首 zìshǒu
(1) [surrender;give oneself up to (the police,justice,etc.);criminate oneself;deliver oneself up;confess one's crime]∶自行投案,承认罪责
她劝他向警察自首
(2) [surrender;give oneself up to the enemy]∶向敌人投降告密
老福,好好地想想吧!向敌人自首了,还算个中国人吗?—— 胡丹佛《把眼光放远一点》