/ Dictionary / Index P Proxima Centauri: Meaning and Definition of Find definitions for: Prox'i•ma Centau'ri Pronunciation: (prok'su-mu), [key] the nearest star to the sun at a distance of 4.3 light-years, part of the Alpha Centauri triple-star system located in the constellation Centaurus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. proxemics proximal Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language