/ˈwɪtnɪs tuː ən ˈoʊvərt ækt/ – Phrase
Definition: người mục kích.
A more thorough explanation: A witness to an overt act is a person who testifies or provides evidence regarding a clearly observable or openly displayed action or behavior that is relevant to a legal proceeding.
Example: The witness testified to an overt act of vandalism committed by the defendant.