/ Dictionary / Index A air plug: Meaning and Definition of Find definitions for: air' plug" Pronunciation: [key] a plug making an airtight seal to a vent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. air plot air pocket Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language