/ Dictionary / Index A air layer: Meaning and Definition of Find definitions for: air' lay"er Pronunciation: [key] to treat a plant by means of air layering. to use air layering to propagate a plant. a plant, commonly a young one, that has been propagated by air layering. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. air-launched cruise missile air layering Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language