1The act of associating and interacting with others; social relationships such as friendships or professional connections.
彼は誰とでも気さくに交際できる人だ。
He's the kind of person who can get along easily with anyone.
近所の人との交際を大切にしている。
I value my relationships with my neighbors.
引っ越してから、地元の人との交際が増えた。
Since moving, I've had more interaction with the locals.
取引先との交際費が今月は多かった。
Entertainment expenses for client relations were high this month.
2Being in a romantic relationship with someone; dating.
二人は大学時代から交際している。
The two of them have been dating since their college days.
交際を始めて一年で結婚を決めた。
They decided to get married a year after they started dating.
両親に交際相手を紹介する予定だ。
I'm planning to introduce my partner to my parents.