A more thorough explanation:

Definition: A safeguard is a measure taken to protect something or someone from harm or danger.

Example: Wearing a helmet while riding a bike is a safeguard against head injuries in case of an accident.

Explanation: In this example, wearing a helmet is a precautionary measure taken to protect the rider's head from injury in case of an accident. The helmet acts as a safeguard against potential harm.

Example: Installing a security system in your home is a safeguard against burglaries and break-ins.

Explanation: In this example, the security system is a protective measure taken to prevent burglaries and break-ins. It acts as a safeguard to keep the home and its occupants safe from harm.