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Definition of marrow noun from the Oxford Advanced Learner's Dictionary

picture of a marrow

marrow

noun

marrow pronunciation English

ˈmærəʊ

marrow pronunciation American

ˈmæroʊ

1 [uncountable] = bone marrow2 (British English) [uncountable, countable] a large vegetable that grows on the ground. Marrows are long and thick with dark green skin and white flesh.