貸切（かしきり）

means place/bus/thing is booked for private, in Mandarin we say 包場 for place or 包車 for tour buses.

貸切

compact kanji spelling; common on signs, websites, booking pages, notices, etc.

本日貸切 – might say this on the restaurant sign

本日は貸切です。
Private event today / Closed to the public for a private booking.

I saw it written like this today, so making a note that this is an alternative spelling, but I feel I see 貸切 more often