Definition from Wiktionary, the free dictionary
- loud enough to cause temporary or permanent hearing loss
- Very loud
2011 October 1, Phil McNulty, “Everton 0 - 2 Liverpool”, BBC Sport:
- At the end of a frantic first 45 minutes, there was still time for Charlie Adam to strike the bar from 20 yards before referee Atkinson departed to a deafening chorus of jeering from Everton's fans.
loud enough to cause hearing loss
- Present participle of deafen.