Definition of pumpkin noun from the Oxford Advanced American Dictionary

 

pumpkin

 noun
noun
NAmE//ˈpʌmpkɪn//
 
[uncountable, countable]
 
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a large round vegetable with thick orange skin. The seeds can be dried and eaten and the soft flesh can be cooked as a vegetable or in sweet pie Pumpkin pie is a traditional American dish served on Thanksgiving. see also jack-o'-lantern
See the Oxford Advanced Learner's Dictionary entry: pumpkin