Concept
A mental grouping of similar things, events, and people that is used to remember and understand what things are, what they mean, and what categories or groups they belong to. For example, if I say to you, "think of a car," the concept, "car" will evoke some ideas in your head about what a car is and what types of characteristics it contains -- does your concept of a car have black tires, two doors, four doors, is it red, white, black, etc.?