- noun the part of an Internet address that identifies an Internet domain, e.g. a two-letter country code or a three-letter code such as .edu for education or .com for commercial when used without a country code.
- On the Internet, one of the one of the main registration categories, such as .com, .net, .org, .edu, .gov, or country designators, such as. de for Germany. It consists of no less than two letters, and appears at the end of a domain name, as in the .com portion of www.yipeeee.com. Us abbreviation is TLD. Also called domain (5).