from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A metalanguage written in SGML that allows one to design a markup language, used to allow for the easy interchange of documents on the World Wide Web.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Initialism of Extensible Markup Language. It is a flexible text format for creating structured computer documents in machine-readable form.
Ex(tensible) M(arkup) L(anguage).(American Heritage® Dictionary of the English Language, Fourth Edition)