from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A 17th-century lute having two sets of strings and an S-shaped neck with two sets of pegs, one set above and somewhat to the side of the other.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A baroque lute having an extra set of open bass strings.
from the GNU version of the Collaborative International Dictionary of English
- n. An instrument made like large lute, but having two necks, with two sets of pegs, the lower set holding the strings governed by frets, while to the upper set were attached the long bass strings used as open notes.
from The Century Dictionary and Cyclopedia
- n. A musical instrument of the lute class, having two necks, the one above the other, the lower bearing the melody strings, which were stretched over a fretted finger-board, and the upper bearing the accompaniment strings or “diapasons,” which were deeper in pitch, and were played without being stopped.
French théorbe, from Italian tiorba.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Italian tiorba, from Turkish torba. (Wiktionary)