self-taught

From self- +‎ taught.

self-taught (comparative more self-taught, superlative most self-taught)

1. Educated or trained by oneself.
   • 1974, Robert M[aynard] Pirsig, Zen and the Art of Motorcycle Maintenance: An Inquiry into Values, New York, N.Y.: William Morrow & Company, →ISBN:

     It's this understanding of Quality as revealed by stuckness which so often makes self-taught mechanics so superior to institute-trained men who have learned how to handle everything except a new situation.

• autodidact
• self-educated