Suit and suit jacket?

We realize a lot of our Malaysian friends commonly use the term "suit" when they are actually just talking about a suit jacket. It is acceptable not to know the proper names for different jackets such as a blazer, sport coat and dinner jacket, but we think it is important to understand the proper definition of a suit and to use the term appropriately.

A suit is defined as "a set of garments made from the same cloth, consisting of at least a jacket and trousers". The keyword here is "set", which means that a suit jacket or a suit pant by its own is not considered a suit. The same thing goes for a car, which is made up of multiple parts, one cannot refer to the engine alone as the car, can he? He is simply referring to the car engine.