What is multithreading?

Multithreading is indeed a feature that allows a program to execute multiple threads simultaneously. This capability enables developers to run different parts of a program in parallel, enhancing the efficiency and performance of applications, particularly in environments where tasks can be performed concurrently, like handling multiple user requests or performing background operations without freezing the main application.

Each thread can be considered a lightweight process that shares the same data space, but can execute independently. This can significantly improve responsiveness and throughput in applications, such as web servers or complex computational tasks.

The other concepts mentioned do not accurately define multithreading. For instance, running software on multiple computers simultaneously relates to distributed computing, while debugging implies a process of troubleshooting code rather than executing multiple threads. Enhancing security is also unrelated to the definition of multithreading, as it focuses on managing multiple operations within a single application environment.