An automobile manufactured by the Italian firm Fiat S.p.A..

An arbitrary or authoritative command or order to do something; an effectual decree.

Authorization, permission or (official) sanction.

(English law) A warrant of a judge for certain processes.

(English law) An authority for certain proceedings given by the Lord Chancellor's signature.

(attributive) (Pertaining to) fiat currency.

(transitive, used in academic debate and role-playing games) To make (something) happen.