/ Dictionary / Index R Remsen: Meaning and Definition of Find definitions for: Rem•sen Pronunciation: (rem'sun), [key] 1846–1927, U.S. chemist and educator. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Remscheid REM sleep Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language