Open for business; indicates that a shop or establishment is currently operating and serving customers.
只今、営業中です。どうぞお入りください。
We're open now. Please come in.
この店は平日は11時から夜10時まで営業中だ。
This shop is open on weekdays from 11 a.m. to 10 p.m.
営業中でも予約が必要な場合があります。
Even when open, reservations may be required.
看板に『営業中』と出ているのに誰もいなかった。
Even though the sign said 'open', there was no one there.