capable of being heard; loud enough to be heard; actually heard.
noun
2.
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.
Origin: 1520–30; < Late Latinaudībilis, equivalent to Latinaudī(re) to hear + -bilis-ble
1520s, from M.Fr. audible, from L.L. audibilis, from L. audire "to hear," from PIE *awis-dh-yo-, from base *au- "to perceive" (see audience). Related: Audibly (1630s).