/ Dictionary / Index T theorbo: Meaning and Definition of Find definitions for: the•or•bo Pronunciation: (thē-ôr'bō), [key] — pl. -bos. an obsolete bass lute with two sets of strings attached to separate peg boxes, one above the other, on the neck. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. theor. Theorell Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language