fiat

fiat [fē′ät, fē′at, fē′ət; fī′at΄, fī′ət]

n.

[L, 3d pers. sing., pres. subj., of fieri, to become, come into existence < IE base * bheu- > BE]

1. an order issued by legal authority, usually beginning with fiat (let it be done); decree

2. a sanction; authorization

3. any arbitrary order