A preview or private viewing held before public opening (e.g., of an exhibition) or a preliminary inspection/viewing (such as property viewings).
展示会の内覧に招待され、関係者だけが先に作品を見ることができた。
I was invited to the exhibition preview, where only related parties could see the works early.
新築マンションの内覧会で部屋の設備を細かくチェックした。
At the new condominium's preview, I checked the room's facilities in detail.
契約前に必ず物件の内覧を行ってください。
Be sure to view the property before signing the contract.