Definition of watermelon noun from the Oxford Advanced American Dictionary

 

watermelon

 noun
noun
NAmE//ˈwɔt̮ərˌmɛlən//
 
, NAmE//ˈwɑt̮ərˌmɛlən//
 
[countable, uncountable]
 
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a type of large melon with hard, dark green skin, red flesh, and black seeds
See the Oxford Advanced Learner's Dictionary entry: watermelon