noun
A formal legal decree, opinion, or ruling issued by a mufti or other Islamic judicial authority.
A decree issued by a mufti or other Islamic judicial authority that a person should be put to death, usually as punishment for committing apostasy or blasphemy.
(religion, by extension) A formal decree or ruling, or statement, issued by an authority of a religion other than Islam.
(figurative, informal) An emphatic decree or opinion, especially one which condemns or criticizes.
verb
(transitive, rare) To issue a fatwa (noun noun, sense 1) against (someone); specifically (loosely, erroneous), a fatwa imposing a ban or a death sentence.