/ Dictionary / Index S soleus: Meaning and Definition of Find definitions for: so•le•us Pronunciation: (sō'lē-us), [key] — pl. -le•i -le•us•es. a muscle in the calf of the leg, behind the gastrocnemius muscle, that helps extend the foot forward. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: soleus (Thesaurus) Soleure sol-fa Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language