1. vi. To succeed. A program wins if no unexpected conditions arise, or (especially) if it sufficiently robust to take exceptions in stride.
2. n. Success, or a specific instance thereof. A pleasing outcome. A feature. Emphatic forms: 'moby win', 'super win', 'hyper-win' (often used interjectively as a reply). For some reason 'suitable win' is also common at MIT, usually in reference to a satisfactory solution to a problem.