/ Dictionary / Index G giant star: Meaning and Definition of Find definitions for: gi'ant star' Pronunciation: [key] a star having a diameter of from 10 to 100 times that of the sun, as Arcturus or Aldebaran. Cf. supergiant star. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. giant squid giant steps Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language