Full house; all seats occupied — often used for theaters, restaurants, or events.
土曜の夜は映画館が満席で、次の回まで待たなければならなかった。
On Saturday night the cinema was full, and we had to wait until the next screening.
人気のレストランはいつも満席なので、予約をして行ったほうがいい。
A popular restaurant is always full, so it's better to make a reservation before going.
コンサートは満席で、立ち見の人もいた。
The concert was sold out and there were even people standing at the back.