adjective 1.not actually formulated or expressed; customary; traditional.
2.not written; not put in writing or print; oral: an unwritten agreement.
3.containing no writing; blank.
Origin: 1325–75; Middle English unwriten; see
un-1,
written Synonyms
1. implicit, understood, tacit, inferred.
Antonyms
1. specified, stipulated, designated.