/ Dictionary / Index R Rhiannon: Meaning and Definition of Find definitions for: Rhi•an•non Pronunciation: (rē'an-un), [key] — n. Welsh Legend. the wife of Pwyll who, accused of having eaten her son, was forced as a penance to carry people on her back until vindicated by her son's return. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rh factor rhigolene Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language