car park
compound.A place, either outside or in a building, where you can leave your car for a period of time.
compound.A designated area or building where motor vehicles may be left temporarily. This term is standard in British English.
“The car park is full today.”
“We couldn't find a space in the car park, so we parked on the street instead.”
“The new supermarket features a large underground car park with direct access to the main shopping floor.”
This term is common in British English; the American English equivalent is 'parking lot' or 'parking garage'.
Contrast with 'parking lot' (AmE) and highlight the compound noun stress pattern: 'CAR park', not 'car PARK'.
In standard British English, this is written as two separate words, though the single-word form is sometimes seen.