/ Dictionary / Index P Parnaíba: Meaning and Definition of Find definitions for: Par•na•í•ba Pronunciation: (pär"nä-ē'bä), [key] — n. a seaport in NE Brazil. 57,000. a river in NE Brazil, flowing NE to the Atlantic. 900 mi. (1450 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: parnaiba (Thesaurus) parmigiana Parnassian Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language