/ Dictionary / Index A air sign: Meaning and Definition of Find definitions for: air' sign" Pronunciation: [key] — Astrol. Astrol. any of the three astrological signs, Gemini, Libra, or Aquarius, that are grouped together because of the shared attributes of intellect and gregariousness. Cf. triplicity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. airsickness air-slake Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language