A "zár" is a Hungarian term for a lock, a device used to secure doors, gates, or containers. It typically consists of a mechanism that can be opened with a key, combination, or electronic code. Locks are essential for ensuring safety and privacy in homes and businesses. Locks come in various types, including padlocks, deadbolts, and electronic locks. Each type serves different security needs and can be made from materials like metal or plastic. The design and complexity of a lock can vary, affecting its level of security and ease of use.