(theology) Any law (or rule) that, in the opinion of believers, comes directly from the will of God (or a god).

(law) The statutory or written law that governs rights and obligations of those who are subject to it.

(law) The law that comprises the rule by which a court hears and determines what happens in civil or criminal proceedings.

(philosophy) The identity of indiscernibles.

(logic) The classically valid but intuitionistically non-valid formula ((P→Q)→P)→P of propositional calculus, which can be used as a substitute for the law of excluded middle in implicational propositional calculus.

(colloquial) mother-in-law

(transitive) To sign (legislation) as a mark of official approval.

(rare) A distant in-law: A relationship by marriage with a separation by three degrees (two people), compared to prototypical in-laws, where the separation is two/one. The separation may be two degrees of blood kin and one of marriage (addressing the mother of the husband of one's daughter), or one degree blood and two of marriage (addressing the brother-in-law of one's brother, or, similarly, addressing the wife of the brother of one's husband).

plural of grandmother-in-law

A grandmother of one's spouse.