/ Dictionary / Index T thenar: Meaning and Definition of Find definitions for: the•nar Pronunciation: (thē'när), [key] — n. Anat. the fleshy mass of the outer side of the palm of the hand. the fleshy prominence or ball of muscle at the base of the thumb. —adj. of or pertaining to the thenar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thenar (Thesaurus) then thenardite Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language