\fi"at\ (?), n. [l., let it be done, 3d pers. sing., subj. pres., fr. fieri, used as pass. of facere to make. cf. be.]
1. an authoritative command or order to do something; an effectual decree. his fiat laid the corner stone. --willis.
2. (eng. law) (a) a warrant of a judge for certain processes. (b) an authority for certain proceedings given by the lord chancellor's signature.
money, irredeemable paper currency, not resting on a specie basis, but deriving its purchasing power from the declaratory fiat of the government issuing it.
n : a legally binding command or decision entered on the court record (as if issued by a court or judge); "a friend in new mexico said that the order caused no trouble out there" [syn: decree, edict, order, rescript]