- witness [wit′nis]n.[ME witnesse < OE (ge)witnes, witness, knowledge, testimony < witan, to know: see WISE1 & -NESS]1. an attesting of a fact, statement, etc.; evidence; testimony2. a person who saw, or can give a firsthand account of, something3. a person who testifies in court4. a person called upon to observe a transaction, signing, etc. in order to testify concerning it if it is later held in question5. something providing or serving as evidencevt.1. to testify to2. to serve as evidence of3. to act as witness of, often, in proof thereof, signing a statement that one has done so4. to be present at; see personally5. to be the scene or setting of [a hall that has witnessed many conventions]vi.1. to give, or serve as, evidence; testify2. to testify to religious beliefs or faith——————bear witnessto be or give evidence; testify
English World dictionary. V. Neufeldt. 2014.