/ Dictionary / Index A air shower: Meaning and Definition of Find definitions for: air' show"er Pronunciation: [key] a shower of secondary cosmic radiation, caused by the interaction of cosmic radiation or gamma radiation with the atmosphere. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. airshow airsick Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language