用作名詞
1.目擊者 固定詞組 witness of
witnesses(at the scene) of the accident 事故(現場)的目擊者
I was a witness to their quarrel.
我是他們吵架時的目擊者。
2.證人
a defence/prosecution witness 被告的/原告的證人
a witness for the defence/prosecution 被告的/原告的證人
(注: witness for也不是詞組,只是一般后面跟for)
3.證明,證據
give witness on behalf of an accused person 為被告方作證
His ragged clothes were (a) witness to his poverty. 他的破爛衣物可以證明他很貧窮。