/ Dictionary / Index S Sunna: Meaning and Definition of Find definitions for: Sun•na Pronunciation: (soon'u), [key] — n. Islam. the traditional portion of Muslim law, based on the words and acts of Muhammad, and preserved in the traditional literature. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sunna (Thesaurus) sunn Sunni Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language