/ Dictionary / Index V variable star: Meaning and Definition of Find definitions for: var'iable star' Pronunciation: [key] — Astron. Astron. a star that varies markedly in brightness from time to time. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. variable region variable time fuze Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language