unwritten
adjective
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
2. using speech rather than writing
3. said or done without having been planned or written in advance
Similar word(s): unscripted, spontaneous
Sentences with unwritten as an adjective:
- It's an unwritten rule that you lock the gate when you leave the swimming pool.
- unwritten paper
verb
1. past participle of unwrite