concept

noun

• an abstract idea:structuralism is a difficult concept the concept of justice
• a plan or intention:the centre has kept firmly to its original concept
• an idea or invention to help sell or publicize a commodity:a new concept in corporate hospitality
• [as modifier] (of a car or other vehicle) produced as an experimental model to test the viability of innovative design features:a concept car for next month’s Geneva motor show
• Philosophy an idea or mental image which corresponds to some distinct entity or class of entities, or to its essential features, or determines the application of a term (especially a predicate), and thus plays a part in the use of reason or language.