apartment building with auto-locking entrance
Refers to a multi-unit residential building where the main entrance locks automatically and requires a key or intercom for this word. Common in urban Japan.
See also: オートロック
Auto-lock apartment buildings have high security.
When entering my friend's auto-lock apartment building, I called them on the intercom.
Variant with interpunct; less common but seen in some listings.
Wasei-eigo (Japanese-made English) combining 'auto-lock' and 'mansion'. 'Mansion' in Japanese refers to a condominium or apartment building, not a large house.