Process termination refers to the end of a process's execution in a computer system. This can occur for various reasons, such as the process completing its task, being manually stopped by a user, or being terminated by the operating system due to errors or resource constraints. When a process is terminated, the operating system releases the resources it was using, such as memory and CPU time. This ensures that the system remains efficient and can allocate resources to other processes. Proper termination is essential for maintaining system stability and performance.