Lock

The phrase "lock" has multiple meanings depending on the context. Here are three common definitions: 1. Noun: A lock is a mechanical device used to secure something, such as a door, gate, or container, by fastening it with a key, combination, or other means of restriction. A lock typically consists of a bolt or latch that fits into a strike plate or socket when engaged, preventing unauthorized access or opening. 2. Verb: To lock means to fasten or secure something using a lock. It involves the action of engaging the locking mechanism to keep an object or space closed or inaccessible. 3. Noun: In computer science, a lock refers to a synchronization mechanism used to control access to a shared resource in multi-threaded or concurrent programming. It is used to prevent multiple threads from simultaneously executing or modifying a particular segment of code or data structure, ensuring consistency and avoiding race conditions.