/ Dictionary / Index A absolute magnitude: Meaning and Definition of Find definitions for: ab'solute mag'nitude Pronunciation: [key] — Astron. Astron. the magnitude of a star as it would appear to a hypothetical observer at a distance of 10 parsecs or 32.6 light-years. Cf. apparent magnitude. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. absolutely absolute majority Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language