"Enterprise" is one of my least favorite buzzwords. (Though the top of my list of buzzword hatred will always be "solution". Ugh. Enterprise is probably a close second or third.)
For the life of me I don't know what "enterprise" means, when used in the buzzword sense to refer to software. Wikipedia links to this page which has an interesting definition:
Enterprise (adj) Large.
That may just sum it up. The general impression I get from "enterprise software" is a program used at a business. And yes, some sense that it's large. Beyond that...? It doesn't make me want to buy something when someone tells me their product is "enterprise", though I get the impression that it should?
I know there are people who really use language like this on / against other people. Are there really people who fall for it though? There must be, or people wouldn't talk like that. Or is this like some kind of marketers' cant, where marketers made up a bunch of words they can use to talk to other marketers without anyone else being able to tell what they're saying?