/ Dictionary / Index R rosebay: Meaning and Definition of Find definitions for: rose•bay Pronunciation: (rōz'bā"), [key] — n. any of several rhododendrons, as the great laurel of eastern North America or Rhododendron macrophyllum, of the west coast of North America. the willow herb, Epilobium angustifolium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rosebay (Thesaurus) Roseau rose beetle 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