(mathematics) The process of approaching some limiting value.

(Internet) The (often repeated) cancellation and reregistration of a domain name so as to exploit the grace period to display advertisements on the domain while not paying for it.

(Internet) Any of various forms of exploitation of the grace period during which a newly registered domain name can be cancelled.

(biology) A part of protein sequence and structure that can evolve, function, and exist independently of the rest of the protein chain.

plural of protein domain

(algebra) an integral domain in which division with remainder is possible

(denotational semantics, domain theory) A domain of nondeterministic and concurrent computations, whose elements are certain subsets of a domain.

(rare, informal) The state or quality of being in the public domain, free of copyright restrictions.

plural of domain name

(Internet, informal) An Internet domain name in which the top-level domain (such as a country code) can be understood as part of the name rather than the usual suffix.