(chiefly clothing) Initialism of extra small (the manufactured size or an item of that size).

(chiefly clothing) Initialism of extra small (of the manufactured size).

plural of X

plural of x

(computer languages, XML) Initialism of Extensible Style Sheet Language Transformations.

(computer security, Internet) Initialism of cross-site scripting.

(computing) Extensible stylesheet language, any of a family of languages in which code can be written to describe how XML files are to be transformed.

(computer security) Initialism of cross-site request forgery.

(computing, Internet) Initialism of XML Schema Definition.

Archaic form of Xmas.