unwritten

  • (a) 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) using speech rather than writing
    • an oral tradition
    • an oral agreement
    oral,
  • (s) said or done without having been planned or written in advance
    • he made a few ad-lib remarks
    ad-lib, spontaneous,

Synonyms

oral ad-lib spontaneous

Antonyms

written

Words of close approximity

unwritten law