/ Dictionary / Index A air arm: Meaning and Definition of Find definitions for: air' arm" Pronunciation: [key] the aviation section of a national military force, including aircraft, base and support facilities, and personnel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. air alert air attaché Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language