The Collaborative International Dictionary
Unwritten \Un*writ"ten\, a.
Not written; not reduced to writing; oral; as, unwritten agreements.
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Containing no writing; blank; as, unwritten paper.
Unwritten doctrines (Theol.), such doctrines as have been handed down by word of mouth; oral or traditional doctrines.
Unwritten law. [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.
Unwritten laws, such laws as have been handed down by tradition or in song. Such were the laws of the early nations of Europe.
Usage examples of "unwritten laws".
Only, there were traditions among Enforcers, unwritten Laws, codes of behavior.
Incidentally, a measure of concession to Plinio's world, an element of rebellion against certain unwritten laws of Castalia, is contained in the mere fact that he wrote these poems and even on occasion showed them to several schoolmates.
Thanks to Martin's lecture she had gained some insight into the unwritten laws of the male worldan archaic society where violence was not the last resort, but a declaration of worth.