/ Dictionary / Index K K star: Meaning and Definition of Find definitions for: K star Pronunciation: [key] — Astron. Astron. a relatively cool, orange-to-red star, as Aldebaran or Arcturus, having a surface temperature between 3500 and 5000 K and an absorption spectrum with strong lines of calcium and many neutral metals. Cf. spectral type. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ksi Kt Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language