noun
partly open; ajar; half-open
Describes doors, windows, eyes, or flowers that are not fully open. Often used for a door left ajar or a flower in half bloom.
ドアが半開きになっている。
The door is ajar.
半開きのバラがきれいだ。
The half-open rose is beautiful.
Compound of 半 (half) and 開き (opening), the noun form of 開く (to open).