Wiktionary
downforce
n. Any force (produced by aerodynamics or gravity etc) that acts downwards
Wikipedia
Downforce
Downforce is a downwards thrust created by the aerodynamic characteristics of a car. The purpose of downforce is to allow a car to travel faster through a corner by increasing the vertical force on the tires, thus creating more grip''.
Usage examples of "downforce".
This keeps the chassis set and maintains the downforce or tire patch while I aim for the apex area and increases the tire patch for cornering.
HYDRODYNAMIC FORCES Lift, downforce, or drag caused by the flow of water over the surface of a moving object.