French phrase
~ est-il libre ?
Meaning
Is ___ free?
When to use it
Asks whether something is unoccupied. It is polite and slightly formal, often used for seats.
Example dialogue
Excusez-moi, ce siège est-il libre ?
Excuse me, is this seat free?
Oui, vous pouvez vous asseoir.
Yes, you can sit down.