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English definition of “unwritten”

unwritten

adjective uk   /ʌnˈrɪt.ən/ us    /-ˈrɪt̬-/
describes something that does not exist in a written or printed form: an unwritten constitutionWriting and typing describes a rule or law that does not exist officially but that people generally accept and obey: There's an unwritten rule that you don't wear jeans to work.UncertaintyHesitatingAchievable
(Definition of unwritten from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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