Support, especially financial.
A backdrop.
The mounting of a horse or other animal.
The action of putting something back; a switching into reverse.
A liner or other material added behind or underneath.
Musicians and vocalists who support the main performer.
Providing support for the main performer.
Assistance, help given to get started or overcome a problem or obstacle.
A boost, a sudden improvement; an advantage, an edge.
The act of assisting another's progress over a wall or other obstacle by forming a step for one of their feet with one's hands.