Noun

(en noun)

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

* 1788 , Alexander Hamilton,

The reflection that the fate of a fellow-creature depended on his sole fiat , would naturally inspire scrupulousness and caution; [...]

(English law) A warrant of a judge for certain processes.

(English law) An authority for certain proceedings given by the Lord Chancellor's signature.

Noun

(en noun)

Mental acceptance of a claim as likely true.

*{{quote-magazine, date=2013-12-06, author=(George Monbiot)

, volume=189, issue=26, page=48, magazine=(The Guardian Weekly) , title= Why I'm eating my words on veganism – again , passage=The belief that there is no conflict between [livestock] farming and arable production also seems to be unfounded: by preventing the growth of trees and other deep vegetation in the hills and by compacting the soil, grazing animals cause a cycle of flash floods and drought, sporadically drowning good land downstream and reducing the supply of irrigation water.}}

Faith or trust in the reality of something; often based upon one's own reasoning, trust in a claim, desire of actuality, and/or evidence considered.

(countable) Something believed.

(uncountable) The quality or state of believing.

(uncountable) Religious faith.

(in the plural) One's religious or moral convictions.