A public display of works of art or items of interest, held in a museum or gallery for people to see.
An exhibition can be part of a museum, or it can be a stand alone exhibition. Exhibitions can be temporary or permanent. A museum usually shows a large collection of various objects and artifacts, covering many different topics or themes. An exhibition is smaller and focused on a single topic or theme: a specific artist, a specific period in time, a single object or event, etc.