(algebra) An integral domain which has a subset whose elements are said to be "positive", such that this subset is closed under addition, closed under multiplication, and all elements of the integral domain satisfy a law of trichotomy; namely, that either that element is in the said subset, or it is the zero (additive identity), or its product with −1 (the additive inverse of the multiplicative identity) belongs to the said subset.

(algebra, ring theory) A unique factorization ring which is also an integral domain.

plural of unique factorization domain

plural of top-level domain

plural of second-level domain

(computing, Internet) The last component of a domain name, such as .com, .edu, .gov, .net, .org, .mil, .mobi or any of the newer generic top-level domains, or any of the ccTLDs. Abbreviated TLD.

(computing, Internet) A service provided by the Domain Name System, allowing domain names to be resolved to IP addresses.

(computing, Internet) A computer that provides domain name information to a network; a computer that is part of the Domain Name System.

(computing, Internet) A domain that is immediately subordinate to a top-level domain (whose name appears after it, with a period separating the two).

(computing, Internet) The distributed database, sometimes including all the supporting hardware or software infrastructure, the Internet uses to translate hostnames into IP addresses and provide other domain-related information.