The term "Closeable" refers to an interface in programming, particularly in the Java programming language. It is used to define objects that can be closed, typically to release resources such as file handles or network connections. When an object implements the Closeable interface, it must provide a method called close(), which is responsible for cleaning up resources when they are no longer needed. Using the Closeable interface helps prevent resource leaks, which can lead to performance issues in applications. It is commonly used in conjunction with the try-with-resources statement, allowing developers to automatically close resources when they are done using them, ensuring efficient resource management and cleaner code.