- Music.
- a meeting of a group of musicians, especially jazz musicians, to improvise, experiment, or play for their own enjoyment.
- an impromptu musical performance, especially of jazz.
- a special performance by musicians, especially jazz musicians, who do not regularly play together.
- an informal, freely collaborative meeting, conference, or discussion: The event was a laid-back jam session for creatives to get together and network.
- an unrehearsed or improvised jazz or rock performance
