noun
front door (cabinet, bus, etc.)
Refers to the front-facing door of a cabinet, bus, or similar object. Not used for building entrances.
バスの前扉から乗車してください。
Please board through the front door of the bus.
この食器棚の前扉は少し歪んでいる。
The front door of this cupboard is slightly warped.
noun
half-title; bastard title
Bookbinding term for the page before the full title page, often bearing only the title. Technical use.
前扉には本のタイトルだけが印刷されている。
Only the book's title is printed on the half-title page.