noun
semi-cohabitation; almost living together
Describes a relationship where a couple spends most nights together but does not officially live together. Often used in modern dating contexts.
See also: 同棲
彼氏と半同棲を始めてから、家賃が少し浮くようになった。
Since I started semi-cohabiting with my boyfriend, I've been saving a bit on rent.
半同棲の状態が続いているけど、正式に一緒に住むかどうかはまだ決めていない。
We've been in a semi-cohabitation situation for a while, but we haven't decided yet whether to officially move in together.