1. mathematics In the theory of functions, the set of
argument values for which a
function is defined.
2.
networking A group of computers whose
hostnames share a
common suffix, the "domain name". The last component of this
in which a developer works. Domains define developers' and
users' areas of responsibility and the scope of possible
relationships between products.
5. The subject or market in which a piece of software is
designed to work.
(1997-12-26)