An "extension" refers to an addition or expansion of something, often used in various contexts. In technology, it can mean a software add-on that enhances the functionality of a program, such as a web browser extension that blocks ads. In education, an extension might refer to a program that allows students to continue their studies beyond the traditional timeframe. In the context of time, an extension can mean a prolongation of a deadline or due date, giving individuals more time to complete a task. For example, a student may request an extension on an assignment to ensure they can submit quality work.