Leverage \Lev"er*age\ (l[e^]v"[~e]r*[asl]j or l[=e]"v[~e]r*[asl]j), n. The action of a lever; mechanical advantage gained by the lever.

Leverage of a couple (Mech.), the perpendicular distance between the lines of action of two forces which act in parallel and opposite directions.

Leverage of a force, the perpendicular distance from the line in which a force acts upon a body to a point about which the body may be supposed to turn.

Source: Webster's Revised Unabridged Dictionary (1913)