noun. a craftsman who makes stringed instruments (as lutes or guitars or violins).
1. Adjective, comparative An apprenticeship may carry notoriety if the luthier the student is studying under has a good reputation in the guitar industry, but the student can only learn how to make the guitars the luthier knows how to build. 2. Noun, singular or mass Take your guitar to a guitar luthier and have him repair the damage to the body.