The term "robust" refers to something that is strong, healthy, and able to withstand difficult conditions. It is often used to describe systems, processes, or products that are reliable and perform well under stress. For example, a robust software application can handle a large number of users without crashing. In a biological context, "robust" can describe an organism that is resilient and capable of thriving in various environments. A robust ecosystem supports a diverse range of species and can recover from disturbances, demonstrating the ability to maintain balance and function effectively.