ALMIGHTY Meaning of ALMIGHTY in English adj. & adv. --adj. 1. having complete power; omnipotent. 2 (the Almighty) God. 3 sl. very great (an almighty crash). --adv. sl. extremely; very much. Etymology: OE {aelig}lmihtig (as ALL, MIGHTY) Oxford English vocab. Оксфордский английский словарь. 2012