/ Dictionary / Index T thighbone: Meaning and Definition of Find definitions for: thigh•bone Pronunciation: (thī'bōn"), [key] — n. femur (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thighbone (Thesaurus) thigh thigh-high Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language