unwritten

adj

1. (not-comparable)Not written.

   “The most important rule is unwritten but not unspoken. It is the rule of pronounceability. Sure, xzyqt looks grand, but how do you say it?”

2. (not-comparable)Oral or otherwise communicated without writing.
3. (not-comparable)Implicit or understood but not formally articulated.

   “It's an unwritten rule that you lock the gate when you leave the swimming pool.”

4. (not-comparable)Containing no writing; blank.

   “unwritten paper”

verb

1. (form-of, participle, past)past participle of unwrite