Short for ColdFusion Markup Language, a proprietary markup language developed by Allaire for use with ColdFusion. CFML is a tag-based Web scripting language supporting dynamic Web page creation and database access in a Web server environment. In the language, ColdFusion tags are embedded in HTML files. The HTML tags determine the page's layout while the CFML tags import content based on user input or the results of a database query. Files created with CFML have the file extension .cfm.