From Longman Dictionary of Contemporary Englishalmightyal‧might‧y /ɔːlˈmaɪti $ ɒːl-/ ●○○ adjective 1 → the Almighty/Almighty God/Almighty Father2 → God/Christ Almighty3 → almighty din/crash/row etc
Examples from the Corpus
almighty• An almighty cloudburst of possibilities had cascaded over his head and he loved that too.• I hope it gave them an almighty hangover.• She stood her ground and got an almighty shove from Vassily, who smiled at me apologetically as he delivered the blow.• If two men ever met, there would be an almighty, violent battle.• When we passed a small shrine by the side of the track everyone let out an almighty whoop of greeting.Origin almighty Old English ealmihtig, from eall “completely” + mihtig “powerful” 