/ Dictionary / Index R Rhein: Meaning and Definition of Find definitions for: Rhein Pronunciation: (Ger. rīn), [key] the Rhine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rhein (Thesaurus) Rheims-Douay Bible Rheingau Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language