unwritten

listen to the pronunciation of unwritten
İngilizce - İngilizce
Spoken or otherwise communicated other than in writing
Implicit or understood but not formally articulated

It's an unwritten law that you lock the gate when you leave the swimming pool.

Past participle of unwrite
{a} not written, traditional, verbal
Something such as a book that is unwritten has not been printed or written down. Universal have agreed to pay £2.5 million for Grisham's next, as yet unwritten, novel
said or done without having been planned or written in advance; "he made a few ad-lib remarks"
so ancient that they well might have had their unwritten origins in Aurignacian times"- J
based on custom rather than documentation; "an unwritten law"; "rites
Not written; not reduced to writing; oral; as, unwritten agreements
using speech rather than writing; "an oral tradition"; "an oral agreement"
Containing no writing; blank; as, unwritten paper
based on custom rather than documentation; "an unwritten law"; "rites so ancient that they well might have had their unwritten origins in Aurignacian times"- J L T C Spence
{s} not written down, not recorded
Spence
An unwritten rule, law, or agreement is one that is understood and accepted by everyone, although it may not have been formally or officially established. They obey the one unwritten rule that binds them all -- no talking. an unwritten rule, law, agreement etc is one that everyone knows about although it is not official
unwritten law
law that is not written, custom, norm
unwritten law
law based on customary behavior
unwritten