/ Dictionary / Index R red dwarf: Meaning and Definition of Find definitions for: red' dwarf' Pronunciation: [key] — Astron. Astron. any of the faint reddish stars having diameters about half that of the sun and low surface temperatures, about 2000–3000 K; a main sequence star of spectral type M. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. red duster rede 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