Definition of jack-o’-lantern noun from the Oxford Advanced Learner's Dictionary

 

jack-o’-lantern

 noun
noun
BrE BrE//ˌdʒæk ə ˈlæntən//
 
; NAmE NAmE//ˈdʒækə læntərn//
 
 
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a pumpkin (= a large orange vegetable) with a face cut into it and a candle put inside to shine through the holes
See the Oxford Advanced American Dictionary entry: jack-o’-lantern