noun
single door; door that opens from one side
Refers to a door that has one leaf and opens in one direction, as opposed to a double door (両開き). Used in architectural and everyday contexts.
See also: 両開き
この部屋のドアは片開きです。
The door to this room is a single door.
片開きの冷蔵庫を買いました。
I bought a refrigerator with a single door.