robustSaid of a system that has demonstrated an ability to recover gracefully from the whole range of exceptional inputs and situations in a given environment. One step below bulletproof. Carries the additional connotation of elegance in addition to just careful attention to detail. Compare smart, opposite: brittle. [Jargon File]
robots.txt ♦ robust ♦ Rockwell Protocol Interface ♦ Rocky Mountain Basic
Try this search on Wikipedia, Wiktionary, Google, OneLook.