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。