• SUV stands for Sports Utility Vehicle, a car similar to a minivan or a station wagon,
• But with a much tougher look and a design suited for off-road driving. 
• SUV is often categorized under RV(Recreational Vehicle), but it is sometimes used in exchange.
• MPV stands for Multi-Purpose Vehicle, often called a minivan.
• An MPV is characterized by spacious cabin and ample occupancy.

MPV is also considered as a category under RV; and the Carnival/Sedona is the most representative MPV.

CUV, also known as Crossover Utility Vehicles, is a combination of a family-sized saloon and a purebred SUV.