/di-strə-ˈbyü-shən/
n. 1. A software source tree packaged for distribution; but see kit.
2. A vague term encompassing mailing lists and USENET newsgroups (but not BBS fora); any topic-oriented message channel with multiple recipients.
3. An information-space domain (usually loosely correlated with geography) to which propagation of a USENET message is restricted; a much-underutilized feature.