unwritten : Idioms & Phrases

• (Theol.), such doctrines as have been handed down by word of mouth; oral or traditional doctrines.

Webster 1913

• noun law based on customary behavior
  unwritten law.
  

WordNet

• . Cf. L. lex non scripta. That part of the law of England and of the United States which is not derived from express legislative enactment, or at least from any enactment now extant and in force as such. This law is now generally contained in the reports of judicial decisions. See Common law, under Common.

Webster 1913

• noun law based on customary behavior
  unwritten law.
  

WordNet

• such laws as have been handed down by tradition or in song. Such were the laws of the early nations of Europe.

Webster 1913