As a Noun: 1. In a vehicle, a device that secures the doors. English = door lock. Note: 1. There appears to be no commonly used Auslan sign for DOOR LOCK for most signers (but some signers represent this visually using these depicting signs, once they have established the topic). This suggested sign is a combination of the Auslan sign DOOR and the action of turning a key in a lock. Source of this recommended sign: Victorian College for the Deaf.