Designating a law or body of law based on established customs, traditions, or usages. Cf. customary, adj. 3. Obsolete.

Law. Designating a law or body of law based on established customs, traditions, or usages rather than common law or statute; esp. in customary law…

According to consuetude, custom, use and wont, or usage; customary.

Pertaining to custom, of use and wont. spec. in Philology, esp. as the epithet of a particular mood in Celtic languages.

Designating a right (usually enforceable by law) guaranteeing non-interference in one's actions (esp. by the state). Also: designating a right…