An Anonymous Function is a function that is defined without a name. It is often used in programming to create quick, short-lived functions that can be passed as arguments to other functions or used in a specific context. These functions are particularly useful in situations where a simple operation is needed without the overhead of defining a full function. In many programming languages, such as JavaScript and Python, anonymous functions are commonly referred to as "lambda functions" or "function literals." They allow developers to write cleaner and more concise code, especially when working with higher-order functions that take other functions as input.