jam session

1. 1.

   an impromptu jazz concert

   Broadermusical performance

Questions about jam session

What does jam session mean?

jam session means "an impromptu jazz concert".

Is jam session a common word?

jam session is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.