a document authorizing somebody to receive money or other consideration

a travel warrant

a document authorizing an officer to make an arrest, a search, etc

an official certificate of appointment, e.g. one issued to a warrant officer

a short-term obligation of a governmental body, e.g. a municipality, issued in anticipation of revenue

a document issued by a company giving to the holder the right to purchase the capital stock of the company at a stated price either prior to a stipulated date or at any future time

a sanction or authorization

evidence for or a token of authorization

to guarantee (e.g. a fact or statement of fact) to be as represented

to guarantee (something), esp to guarantee (e.g. goods sold) in respect of the quality or quantity specified