Abbreviation for "Uniform Resource Locator" - The web address (location) of a website, file, or resource on the Internet. For example, http://www.free-webhosts.com/ is a URL.
A related term is URI (an abbreviation for "Uniform Resource Identifier", which is a formatted text string that is an identifier for a resource, generally on the Internet. URIs are used in HTML to identify the anchors of hyperlinks. URIs include URLs and "relative URLs".