A Priori

1. (logic) Based on hypothesis and theory rather than experiment or empirical evidence.
2. Self-evident, intuitively obvious.
3. Presumed without analysis.
4. (linguistics, conlanging) Developed entirely from scratch, without deriving it from existing languages.^[1]

Synonyms

• deductive

Antonyms

• a posteriori

Adverb

1. (logic) In a way based on theoretical deduction rather than empirical observation.