concept
noun
general
“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.”
Additional Info:
“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.”
Definition and Info Source: old version of https://en.wikipedia.org/wiki/Concept
idea