noun

1. Support, especially financial.

   "It's a volunteer organization that works with backing from the city and a few grants."

2. A liner or other material added behind or underneath.

   "The cardboard backing gives the notebook a little extra stiffness."

3. A backdrop.

4. Musicians and vocalists who support the main performer.

5. The mounting of a horse or other animal.

6. The action of putting something back; a switching into reverse.