/ Dictionary / Index A aurora australis: Meaning and Definition of Find definitions for: auro'ra aus•tra'lis Pronunciation: (ô-strā'lis), [key] — Meteorol. Meteorol. the aurora of the Southern Hemisphere. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Aurora aurora borealis Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language