Check-out is the morning moment you return the key and leave the hotel. Check-out is at eleven, late check-out, at the check-out desk.
The time is set to give housekeeping the gap it needs before the next arrival, which is why eleven and three are the usual pair. Late check-out is often free if you ask and the hotel is quiet. In a shop the checkout is where you pay.
1nouncheck-outThe moment of leaving a hotel and settling the bill.
“Check-out is at eleven, so please leave your key at reception.”
check-out is a departure.
Also accepted in games: checkout time
a deverbal from check out.
Etymology from Wiktionary, CC BY-SA