noun
exhibition hall; pavilion
A building or hall used for exhibitions, displays, or trade shows. Often used in names of facilities.
新しい展示館で現代アートの展覧会が開かれている。
An exhibition of contemporary art is being held at the new exhibition hall.
美術館 is an art museum, typically a permanent institution, whereas 展示館 is a more general exhibition building that may host temporary displays.
Compound of 展示 (exhibition) and 館 (building, hall).