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
-
(s) said or done without having been planned or written in advance
- he made a few ad-lib remarks