witness

(law) a person who attests to the genuineness of a document or signature by adding their own signature.

Someone who sees an event and reports what happened.

A close observer; someone who looks at something (such as an exhibition of some kind).

(law) a person who testifies under oath in a court of law.

Testimony by word or deed to your religious faith.

Perceive or be contemporaneous with.

Be a witness to.

“She witnessed the accident and had to testify in court”