/ ˈmaɪti; NAmE / adjective , adverb
■ adjective ( might·ier , mighti·est )
1.
(especially literary ) very strong and powerful :
a mighty warrior
He struck him with a mighty blow across his shoulder.
2.
large and impressive
SYN great :
the mighty Mississippi river
•
IDIOMS
see high adjective , pen noun
■ adverb
( informal , especially NAmE ) (with adjectives and adverbs) very
SYN really :
mighty difficult
driving mighty fast
••
WORD ORIGIN
Old English mihtig (see might (noun), -y ).