/ Dictionary / Index A air cock: Meaning and Definition of Find definitions for: air' cock" Pronunciation: [key] a special type of valve for controlling the flow of air. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. air coach air command Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language