What is the meaning of Fiat?

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

Authorization, permission or (official) sanction.

A warrant of a judge for certain processes.

An authority for certain proceedings given by the Lord Chancellor's signature.

(Pertaining to) fiat currency.

To make (something) happen.

past participle of fiar

fiat

third-person singular present passive subjunctive of faciō

third-person singular present active subjunctive of fīō

expression of affirmation; make it so, so let it be, so be it

fee

alternative form of fiyat (“price”)

Source: wiktionary.org