/un rit"n/ , adj.
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.
[ 1325-75; ME unwriten; see UN- 1 , WRITTEN ]
Syn. 1. implicit, understood, tacit, inferred.
Ant. 1. specified, stipulated, designated.