- Adjective. (legal) Known ahead of time.
- Adjective. (logic) Based on hypothesis rather than experiment.
- Adjective. Self-evident, intuitively obvious.
- Adjective. Presumed without analysis.
- Adjective. (context, linguistics) Developed entirely from scratch, without deriving it from existing languages.Donald J. Harlow, [http://donh.best.vwh.net/Esperanto/EBook/chap03.html How to Build a Language].
- Adverb. (logic) Derived by logic.