Breadcrumb Home > Dictionary > Index C cluster variable: Meaning and Definition of Find definitions for: clus'ter var"iable Pronunciation: [key] — Astron. Astron. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cluster point clutch ✖ Related Content Daily Word Quiz: umbrage Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language