Witness

Attestation of a fact or an event; testimony.

That which furnishes evidence or proof.

One who is cognizant; a person who beholds, or otherwise has personal knowledge of, anything; as, an eyewitness; an earwitness.

One who testifies in a cause, or gives evidence before a judicial tribunal; as, the witness in court agreed in all essential facts.

One who sees the execution of an instrument, and subscribes it for the purpose of confirming its authenticity by his testimony; one who witnesses a will, a deed, a marriage, or the like.

To see or know by personal presence; to have direct cognizance of.

To give testimony to; to testify to; to attest.

To see the execution of, as an instrument, and subscribe it for the purpose of establishing its authenticity; as, to witness a bond or a deed.

To bear testimony; to give evidence; to testify.

testimony by word or deed to your religious faith

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

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

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"