trade fair; exhibition center
A German-derived term used for a trade fair or, by extension, an exhibition hall or convention facility. In everyday Japanese, 見本市, 展示会, or 展示場 may be more transparent depending on the context.
from German Messe
A trade fair will be held in Makuhari next month.
The company exhibited at a trade fair in Germany.
A large exhibition will be held at Makuhari Messe next month.
Our company also plans to exhibit at that trade fair.
メッセ (trade fair/exhibition center) and メッセージ (message) share the same opening sound but are completely unrelated in meaning.
messaging app; messenger app
Borrowed from German Messe, meaning a trade fair or fair, and written in katakana in Japanese.