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

(Canada, US) behind

(idiomatic) On or for a round trip journey, literal or figurative.

(transitive) Alternative spelling of back onto

To reverse a vehicle into a space. / (idiomatic) A betting term from French hazard

In the past time of.

plural of backing

(phonetics) Quality of being a back vowel.