/ Dictionary / Index A air cover: Meaning and Definition of Find definitions for: air' cov"er Pronunciation: [key] the use of aircraft to protect ground or naval military operations. the protection given by such aircraft. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. air corridor aircraft 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