English translation of '擅自'

动

1. take it upon oneself (pt took) (pp taken)
   ⇒ 上司不在,他擅自和客户签了协议。 (Shàngsi bù zài, tā shànzì hé kèhù qiānle xiéyì.) Since the boss was out, he took it upon himself to sign the agreement.