Concept

A concept (abstract term: "conception") is a cognitive unit of meaning— an abstract idea or a mental symbol sometimes defined as a "unit of knowledge," built from other units which act as a concept's characteristics.
A concept is typically associated with a corresponding representation in a language or symbology such as a word. The meaning of "concept" is explored in mainstream cognitive science and philosophy of mind.
The term "concept" is traced back to 1554–60 (l. conceptum - something conceived), but what is today termed "the classical theory of concepts" is the theory of Aristotle on the definition of terms.
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