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English definition of “witness”

witness

verb [T] (BE THE PERSON WHO SEES)   /ˈwɪt·nəs/
to see something happen: We were there at the time and witnessed the accident. The university has witnessed (= experienced) quite a few changes over the years. Witness also means to show or give proof of something: The program aroused strong feelings, as witnessed by the number of letters the station received. Rock music is becoming a health problem – witness the loss of hearing (= for proof, look at the loss of hearing) in some of our youth. If you are asked to witness an event, you are asked to be present at it and sign your name to prove that things have been done correctly.
(Definition of witness verb (BE THE PERSON WHO SEES) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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