Related Clues:

• Message on a restroom door, perhaps
• Opposite of vacancy, on some signs
• Locked lavatory stall sign
• Locked, as a lavatory
• Occupied (5)
• Already occupied
• Not vacant, as a restroom
• Being employed
• Being utilized
• Bathroom sign
• Not vacant
• Sign on a locked lavatory
• Like a locked lavatory
• Lavatory door sign
• Locked, as a bathroom