unwritten

adj 1: 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 [ant: {written}]

2: using speech rather than writing; "an oral tradition"; "an

oral agreement [syn: {oral}]

3: said or done without having been planned or written in

advance; "he made a few ad-lib remarks" [syn: {ad-lib}, {spontaneous}]