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.
Fiat money, irredeemable paper currency, not resting on a
specie basis, but deriving its purchasing power from the declaratory fiat of the government issuing it.
Hear it pronounced