domain name

A domain name is a unique address that internet users enter into a web browser to access a website. It corresponds to a numerical identifier called an Internet Protocol (IP) address but is easier to type, read, and remember.

Domain names follow a hierarchical structure. The top-level domain (TLD) appears at the end, such as “.com” for commercial entities, “.gov” for government organizations, or “.edu” for educational institutions. The second-level domain precedes the TLD and typically identifies the organization or individual that registered the domain. Some domain names may also include a third-level domain, such as “www” or another subdomain, which can designate a specific service or host. For example, the domain name “www.cornell.edu” indicates a site maintained by Cornell University, an educational institution.

Organizations may not control every domain name resembling their name. However, trademark law can restrict others from registering or using names that are identical or confusingly similar to protected marks.

See also:  Uniform Resource Locator (URL)

[Last reviewed in September of 2025 by the Wex Definitions Team] 

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