/ Dictionary / Index A aircraft observer: Meaning and Definition of Find definitions for: air'craft observ"er Pronunciation: [key] observer (def. 4). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aircraft carrier aircraftsman Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language