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Definition of jam-packed adjective from the Oxford Advanced Learner's Dictionary

jam-packed

adjective
 
/ˌdʒæm ˈpækt/
 
/ˌdʒæm ˈpækt/
[not usually before noun] (informal)
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  1. jam-packed (with somebody/something) very full or crowded
    • The train was jam-packed with commuters.
See jam-packed in the Oxford Advanced American Dictionary
previously
adverb
 
 
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