A "stub" is a term used in various fields, primarily in programming and documentation. In software development, a stub is a piece of code that simulates the behavior of a component that is not yet implemented. This allows developers to test and integrate parts of a system without needing the complete functionality. In documentation, a stub refers to an incomplete entry or article that requires further information. For example, a Wikipedia stub might provide basic details about a topic but lacks comprehensive coverage. Stubs serve as placeholders, encouraging contributors to expand and improve the content over time.