object that can be described by the criteria for being a vehicle.
* Car, the class of all cars, or the abstract object that can be described by the criteria for being a car.
* Class, representing the class of all classes, or the abstract object that can be described by the criteria for being a class.
* Thing, representing the class of all things, or the abstract object that can be described by the criteria for being a thing (and not nothing).

Definition

Classes – concepts that are also called type,

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