A concept is an idea around which a group of ideas may revolve. A concept is something that helps us organize our thinking. It's a mental representation of a group of facts or ideas that somehow belong together. For example, football, basketball, tennis, swimming, boxing, soccer, or archery all fit our concept of sports. Concepts can represent objects, activities, or living things.
Concepts come in a variety of forms, including concrete, abstract, verbal, nonverbal, and process.
A. Concrete or abstract. Concrete concepts are those that we can see, touch, hear, taste, or smell. Dogs, chairs, telephones and hamburgers are examples of concrete concepts. Abstract concepts can be used and thought about, but we cannot use our senses to recognize them as we can with concrete concepts. In order to understand abstract concepts, we either have to experience them or compare them to something else we already know.