/ Dictionary / Index C Cepheid variable: Meaning and Definition of Find definitions for: Ce'pheid var"iable Pronunciation: [key] — Astron. Astron. a variable star in which changes in brightness are due to alternate contractions and expansions in volume. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -cephaly, Cepheus Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language