/ Dictionary / Index S Sierra Leone: Meaning and Definition of Find definitions for: Sier'ra Le•o'ne Pronunciation: (lē-ō'nē, lē-ōn'), [key] an independent republic in W Africa: member of the Commonwealth of Nations; formerly a British colony and protectorate. 3,000,000; 27,925 sq. mi. (72,326 sq. km). Cap.: Freetown. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sierra Sierra lily Related Content Daily Word Quiz: pedagogy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language