/ Dictionary / Index R Roseau: Meaning and Definition of Find definitions for: Ro•seau Pronunciation: (rō-zō'), [key] — n. a seaport on and the capital of Dominica. 10,417. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: roseau (Thesaurus) roseate spoonbill rosebay Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language