An example.
"for example" or "for the sake of an example": used to introduce an illustrative example or short list of examples.
Something that serves as evidence; a sign or token.
Attestation of a fact or event; testimony.
One who sees or has personal knowledge of something.
Someone called to give evidence in a court.
One who is called upon to witness an event or action, such as a wedding or the signing of a document.
To take as evidence.
To furnish proof of, to show.
To present personal religious testimony; to preach at (someone) or on behalf of.
To see the execution of (a legal instrument), and subscribe it for the purpose of establishing its authenticity.
To see or gain knowledge of through experience.