"significant downforce" refers to the force that is pushing or pressing down on a moving object, usually a vehicle, to help it stay on the ground or maintain traction. Full definition
The front end of the car has been redesigned completely: a more «open» view, with the forward - stretched line of the front skirt and two front wings - one in black carbon fiber and one in the car's color - generating significant downforce in the front of the car. (rssportscars.com)
The front end of the car has been redesigned completely: a more «open» view, with the forward - stretched line of the front skirt and two front wings - one in black carbon fiber and one in the car's colour - generating significant downforce in the front of the car. (lambocars.com)
Although it doesn't share the track car's active aero tricks, it does feature fully revised aerodynamics — wider bumpers and side skirts, new spoilers, diffusers, and underbody channels — all to create significant downforce. (automobilemag.com)