| Fiat 1. (n.) An authoritative command or order to do something; an effectual decree. 2. (n.) A warrant of a judge for certain processes. 3. (n.) An authority for certain proceedings given by the Lord Chancellor's signature. Thesaurus Entries appointment, authority, authorization, brevet, bull, certification, clearance, countenance, declaration, decree, decree-law, decreement, decretal, decretum, dictum, diktat, edict, edictum, empowerment, enabling, endorsement, enfranchisement, entitlement, ipse dixit, law, ordinance, ordonnance, proclamation, pronouncement, pronunciamento, ratification, rescript, rule, ruling, sanction, senatus consult, senatus consultum, ukase, warrant, warranty |