having a place to oneself; having the run of a place
Colloquial expression used when a venue like a restaurant, theater, or park is so empty that it feels like it's been reserved for you.
The movie theater on a weekday was practically reserved for us.
This café feels like you have the whole place to yourself if you come early in the morning.
貸切 means 'reserved' or 'chartered' and is used when a place is actually booked for private use. 貸切状態 is a figurative extension meaning it feels reserved because it's empty.
Standard kanji spelling.
Variant with okurigana し切り; slightly more explicit but less compact.
Compound of 貸切 (reserved, from 貸す 'to lend' + 切る 'to do completely') and 状態 (state, condition). The phrase literally means 'reserved state' and is used figuratively for empty venues.