The noun witness has 5 senses (first 4 from tagged texts)
1. (7) witness, witnesser, informant -- (someone who sees an event and reports what happened)
2. (3) spectator, witness, viewer, watcher, looker -- (a close observer; someone who looks at something (such as an exhibition of some kind); "the spectators applauded the performance"; "television viewers"; "sky watchers discovered a new star")
3. (2) witness -- (testimony by word or deed to your religious faith)
4. (1) witness, attestant, attestor, attestator -- ((law) a person who attests to the genuineness of a document or signature by adding their own signature)
5. witness -- ((law) a person who testifies under oath in a court of law)
Overview of verb witness
The verb witness has 2 senses (first 2 from tagged texts)
1. (17) witness -- (be a witness to; "She witnessed the accident and had to testify in court")
2. (7) witness, find, see -- (perceive or be contemporaneous with; "We found Republicans winning the offices"; "You'll see a lot of cheating in this school"; "The 1960's saw the rebellion of the younger generation against established traditions"; "I want to see results")