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Definition of jam noun from the Oxford Advanced American Dictionary

     

    jam

     noun
    noun
    NAmE//dʒæm//
     
     
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    sweet food
  1. 1[uncountable, countable] a thick sweet food made by boiling fruit with sugar, often sold in jars and spread on bread strawberry jam recipes for jams and preserves compare jelly, marmalade
    2. many people/vehicles
  2. 2[countable] a situation in which it is difficult or impossible to move because there are so many people or vehicles in one particular place The bus was delayed in a five-mile jam. As fans rushed to leave, jams formed at all the exits. see traffic jam
    3. machine
  3. 3[countable] a situation in which a machine does not work because something is stuck in one position There's a paper jam in the photocopier.
    4. Idioms
    be in a jam (informal)
     
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    to be in a difficult situation
See jam in the Oxford Advanced Learner's Dictionary
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