1. Devices or systems that prevent a vehicle from being started or operated without proper authorization, typically by disabling the engine or fuel system.
Usage: British English spelling (American: immobilizers); Commonly used in automotive security contexts
2. Medical devices or techniques used to restrict movement of a body part or joint, typically during healing or treatment.
Usage: Medical/healthcare context

Examples

• Modern cars are equipped with immobilisers to prevent theft.
• The immobiliser in my vehicle requires a special key fob to start the engine.
• After the accident, the doctor applied immobilisers to stabilize the patient's fractured arm.
• Insurance companies often offer discounts for vehicles with factory-installed immobilisers.
• The orthopedic surgeon recommended immobilisers to keep the injured shoulder in place during recovery.