An articulated portion of the facade of a building, often higher than, or projecting forward from, the rest If it is in the centre, it is called a frontispiece
A single body or mass of building, contained within simple walls and a single roof, whether insulated, as in the park or garden of a larger edifice, or united with other parts, and forming an angle or central feature of a large pile
A pavilion is a large temporary structure such as a tent, which is used at outdoor public events. the United States pavilion at the Expo '70 exhibition in Japan
A pavilion is a building on the edge of a sports field where players can change their clothes and wash. the cricket pavilion