adj. 1. Said of an Internet address (as opposed to a bang path) because the part to the right of the '@' specifies a nested series of 'domains'; for example, This email address is being protected from spambots. You need JavaScript enabled to view it. specifies the machine called snark in the subdomain called thyrsus within the top-level domain called com.

See also big-endian, sense 2.

2. Said of a site, mailer, or routing program which knows how to handle domainist addresses.

3. Said of a person (esp. a site admin) who prefers domain addressing, supports a domainist mailer, or prosyletizes for domainist addressing and disdains bang paths. This is now (1991) semi-obsolete, as most sites have converted.