Support, especially financial. / A liner or other material added behind or underneath. / (television, film) A backdrop. / (music) Musicians and vocalists who support the main performer.

(music) Providing support for the main performer.

present participle of back

(Britain) A group of musicians who accompany an artist at a live performance or on a recording. This can either be an established group, or else an ad hoc group assembled for the purpose.

plural of backing

present participle of back up

(Construction) A compressible material placed in a joint before applying sealant.

plural of backing band

present participle of back off

present participle of back out