noun
concept
KAHN-sept/ˈkɑːnsept/
An idea or mental model of something.
The different chairs share a basic form that represents the concept of a chair.

Etymology
From “take,” with con- perhaps adding emphasis, the underlying verb meant “take in and hold.” A concept is thus something conceived or formed in the mind, rather than physically taken in.
In context
the concept of energy and I know that most everybody here has an idea of energy
More examples
- Young children gradually develop a concept of time.
- The architect sketches a new concept for the library.
- These two concepts help explain how markets work.
Forms
concept · concepts
conceptual adjective — Relating to ideas rather than concrete details.