/ Dictionary / Index N Nigeria: Meaning and Definition of Find definitions for: Ni•ge•ri•a Pronunciation: (nī-jēr'ē-u), [key] — n. a republic in W Africa: member of the Commonwealth of Nations; formerly a British colony and protectorate. 88,500,000; 356,669 sq. mi. (923,773 sq. km).Cap.:Abuja. Official name, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nigeria (Thesaurus) Niger-Congo Niger-Kordofanian 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