/ Dictionary / Index A aeronautical: Meaning and Definition of Find definitions for: aer•o•nau•ti•cal Pronunciation: (âr"u-nô'ti-kul, -not'i-), [key] — adj. of aeronautics or aeronauts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aeronautical (Thesaurus) aeronaut aeronautical engineering Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language