distribution 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.