Definition of hippie noun from the Oxford Advanced American Dictionary

 

hippie

 noun
(also hippy)noun
NAmE//ˈhɪpi//
 
(pl. hippies)
 
jump to other results
a person who rejected the way that most people live in Western society, often having long hair, wearing brightly colored clothes, and taking illegal drugs. The hippie movement was most popular in the 1960s.
See the Oxford Advanced Learner's Dictionary entry: hippie