The word "aero" is a prefix used to describe things related to air or the atmosphere. It usually indicates movement or functions associated with air, flying, or aviation. Full definition
The Golf GTI Clubsport also gets a new aero package with a new front bumper, side sills, rear diffuser, multi-part roof spoiler, and Clubsport specific 18 or 19 - inch wheels. (speedsportlife.com)
The introduction of aero kits for 2015 brought back memories of the winglet - riddled F1 cars of the late 2000s and the racing suffered a bit too, but for 2018 that's all set to change. (wtf1.com)
New Optional Sport Package For RWD Models Combines Sport Tuned Air Suspension, Brembo Brakes, 19 - inch Forged Wheels with Aero Body Design Elements and Exclusive Interior Features (japanesesportcars.com)