What does jam mean in musical terms?

Jam, in musical terms, refers to an improvised musical performance or an unstructured musical session where musicians collectively create music without prior planning. It commonly involves musicians coming together to play spontaneously, often based on a certain chord progression or musical theme. Jazz, blues, and rock music cultures have a strong tradition of jamming.

During a jam, musicians improvise their parts and interact with each other, expressing themselves creatively. Jam sessions can be informal and relaxed, or they can be structured with a specific musical goal or theme. Whether in a rehearsal space, a live performance, or a casual gathering, jamming allows musicians to explore new musical ideas and foster collaboration.