to see, hear, or know by personal presence and perception

to witness an accident.

to be present at (an occurrence) as a formal witness, spectator, bystander, etc.

She witnessed our wedding.

to bear witness to; testify to; give or afford evidence of.

to attest by one's signature

He witnessed her will.

to bear witness; testify; give or afford evidence.

an individual who, being present, personally sees or perceives a thing; a beholder, spectator, or eyewitness.

a person or thing that affords evidence.

a person who gives testimony, as in a court of law.

a person who signs a document attesting the genuineness of its execution.

testimony or evidence

to bear witness to her suffering.

( initial capital letter ) a member of the Jehovah's Witnesses.

noun

participant

verb

participate , deny , refute

noun

attestant , attestor , beholder , bystander , corroborator , deponent , eyewitness , gawker , looker-on , observer , onlooker , proof , rubbernecker , signatory , signer , spectator , testifier , testimony , viewer , watcher , seer , badge , evidence , index , indication , indicator , manifestation , mark , note , signification , stamp , symptom , token , attester , attestation , deposition , eye-witness , obtestation

verb

attend , be a witness , behold , be on hand , be on the scene , be present , eyeball , flash on , get a load of , look on , mark , note , notice , perceive , pick up on , pipe * , read , see , sight , spot , spy , take in , view , watch , affirm , announce , argue , attest , bear out , bear witness , bespeak , betoken , certify , confirm , corroborate , countersign , depone , depose , endorse , give evidence , give testimony , indicate , say under oath , sign , stand for , subscribe , vouch for , point to , testify , vouch , swear , authenticate , beholder , bystander , evidence , eye , look , observe , observer , obtest , onlooker , proof , signatory , spectator , sponsor , substantiate , testifier , testimony , validate