Definition of “jam session” - English Dictionary

british dictionary

“jam session” in British English

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jam sessionnoun [ C ]

uk /ˈdʒæm ˌseʃ.ən/ us /ˈdʒæm ˌseʃ.ən/

(Definition of “jam session” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)