self-contained

"Self-contained" means that something has everything needed within itself to function or be complete, without needing outside help or additional parts. For example, a self-contained apartment includes all essential facilities like a kitchen and bathroom, so residents don't need to go elsewhere for basic needs. Similarly, a self-contained report or project provides all the necessary information and resources within itself, making it independent and easy to understand or use without referring to external sources. In essence, it is complete on its own and does not rely on anything outside its own boundaries.