Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym Jam Session is...

Jam Session is

  • An ad-hoc meeting where whoever shows up joins the group to play music.

Jam Session is also in:

Acronym Definition Searched: 07175 PHID TAM OKE CIFC 72201 BKH HIV NAHREP PASR MDF 78934 PPH DOD SBN