jack-o’-lantern - definition and synonyms

noun [countable] 

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/ˌdʒæk ə ˈlæntə(r)n/
singularjack-o’-lantern
pluraljack-o’-lanterns
  1. an empty pumpkin with a face cut into it and a light inside that can be seen through the holes. Jack-o’-lanterns are usually made for Halloween.