1. The number on the licence plate that identifies the car that bears it
   - license number [N. Amer], registration number, reg [Brit]

Type of: identification number, number

• house sparrow
• house trailer
• house wren
• house-proud
• house-raising
• house-sit
• house-to-house
• house-train
• house-trained
• houseboat
• housebound
• houseboy
• housebreak
• housebreaker
• housebreaking
• housebroken
• housebuilder
• houseclean
• housecleaning
• housecoat
• housecraft
• housedog
• housefather
• housefly
• houseful