n (computing) A collection of information having to do with a 'domain', the computer | computers named in the 'domain', and the network on which the computers named in the 'domain' reside
n (computing) The collection of computers identified by a 'domain''s domain name | domain names
n (computing) A small magnetized area of a bubble memory storing one bit, a bubble.
n (biology|taxonomy) In the three-domain system, the highest rank in the classification of organisms, above kingdom; in other taxonomic systems, a similarly high rank