1. A general idea or understanding of something: the concept of inertia; the concept of free will. See Synonyms at idea.
2. A plan or original idea: The original concept was for a building with 12 floors.
3. A unifying idea or theme, especially for a product or service: a new restaurant concept.
Having an experimental or strikingly different design, especially to test or demonstrate new features: a concept car.
[Late Latin conceptus, from Latin, past participle of concipere, to conceive; see CONCEIVE.]
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