What defines a "big band" in jazz music?

A big band in jazz music is characterized by its large ensemble format, which usually consists of 10 or more musicians. This configuration typically includes sections of brass instruments (like trumpets and trombones), woodwinds (such as saxophones), and a rhythm section (including piano, guitar, bass, and drums). The sound produced by big bands is fuller and richer than that of smaller jazz groups, allowing for intricate arrangements and a dynamic overall performance style.

The performance context of big bands often includes swing music and arranged compositions, enabling various musicians to showcase their skills within the group structure. Vocalists might be included, but they are not a defining feature of a big band. Instead, the size and combination of instruments are the key elements that distinguish big bands from smaller ensembles. This contrasts with other options, which either highlight smaller groups or refer to classical music, which lacks the improvisational and stylistic elements specific to jazz.