I always thought the term "Enterprise-Software" to be underdefined. On the Glassfish-Wiki I found a somewhat longish but precise definition, covering many non-functional attributes, e.g. multiuser, i18n, scalability, high availability, reliability and so on.
In short: Everything a proper software architect should have on his (clear) mind...
(and, allow some self-marketing, will never forget if supported by our arc42-template).
