au•di•blePronunciation: (ô'du-bul), [key]
capable of being heard; loud enough to be heard; actually heard.
Also called automatic, checkoff. Football.
a play called at the line of scrimmage to supersede the play originally agreed upon as the result of a change in strategy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.