Dude, I am all, like, soooo confused! See? I'm all like trying to figure out whether this guitar repair guy is called a "Loo Ther, Loo Tee Yeah, Lood tee er"?
Ok, no joking now. A Luthier is pronounced "Lu Tear" or click here to go to my source for the pronunciation. Accordingly, the definition is a person who makes stringed musical instruments. Not all people that call himself a Luthier actually make guitars though the name implies that the person holding the title manufacturers stringed musical instruments. To me; a luthier is a skilled person who can manufacture or repair a stringed instrument.