/ Dictionary / Index A air observer: Meaning and Definition of Find definitions for: air' observ"er Pronunciation: [key] — U.S. Army. U.S. Army. observer (def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Air National Guard airpack Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language