Definition of frightening adjective from the Oxford Advanced Learner's Dictionary

Oxford3000

frightening

adjective
ˈfraɪtnɪŋ
 
; ˈfraɪtnɪŋ
 
 
making you feel afraid
a frightening experience/prospect/thoughtIt's frightening to think it could happen again.The noise was frightening.frighteningly
ˈfraɪtnɪŋli
 
; ˈfraɪtnɪŋli
 
adverbThe battle scenes were frighteningly realistic.