n.

1. 目击者；见证人[C][（+to/of）]
   She gave an eyewitness account of the crime.

   她对亲眼目睹的犯罪事件作了陈述。

   He was the only eyewitness of the robbery.

   他是那起抢劫案的唯一目击者。

vt.

1. 亲眼看见，目睹
   The old woman claimed she had eyewitnessed the murder.

   老妇人声称她目睹了那起凶杀事件。

n.