Definition of freak verb from the Oxford Advanced Learner's Dictionary

 

freak

 verb
verb
BrE BrE//friːk//
 
; NAmE NAmE//friːk//
 
Verb Forms present simple I / you / we / they freak
BrE BrE//friːk//
 
; NAmE NAmE//friːk//
 
he / she / it freaks
BrE BrE//friːks//
 
; NAmE NAmE//friːks//
 
past simple freaked
BrE BrE//friːkt//
 
; NAmE NAmE//friːkt//
 
past participle freaked
BrE BrE//friːkt//
 
; NAmE NAmE//friːkt//
 
-ing form freaking
BrE BrE//ˈfriːkɪŋ//
 
; NAmE NAmE//ˈfriːkɪŋ//
 
Fear
 
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[intransitive, transitive] (informal) if somebody freaks or if something freaks them, they react very strongly to something that makes them suddenly feel shocked, surprised, frightened, etc. freak (out) My parents really freaked when they saw my hair. freak somebody (out) Snakes really freak me out. See related entries: Fear Word Origin mid 16th cent. (originally meaning a whim or sudden change of mind): probably from a dialect word.
See the Oxford Advanced American Dictionary entry: freak