Concept is an idea, that conceived in the mind. It was borrowed from Late Latin conceptus, from Latin concipere “to take in, conceive, receive.” It is an idea of something formed by mentally combining all its characteristics or particulars; a construct. It is reified by all of its actual or potential instances, whether these are things in the real world or other ideas. Concept is explored in mainstream information science, cognitive science, metaphysics, and philosophy of mind. It is often used in unclear or inconsistent ways.