availability; vacancy status
Used for checking whether rooms, parking spaces, appointments, seats, etc. are free or occupied. Common in service and reservation contexts.
Please check the hotel's availability.
You can see the parking lot's vacancy status on the website.
満室 means 'no vacancy' (all rooms occupied), the opposite of availability.
Compound of 空き (あき, 'vacancy, empty') and 状況 (じょうきょう, 'situation, status').