/ Dictionary / Index S star cluster: Meaning and Definition of Find definitions for: star' clus"ter Pronunciation: [key] — Astron. Astron. a number of stars of common origin held together as a group by gravitational attraction. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. star cloud star-crossed Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language