A definition is a statement of the meaning of a word or phrase. The term to be defined is known as the definiendum (Latin: that which is to be defined).
http://en.wikipedia.org/wiki/Definition

Version 1.9 The indented, italicized sections below appear as annotations to the Open Source Definition (OSD) and are not a part of the OSD. A plain version of the OSD without ...
http://www.opensource.org/docs/definition.php

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http://dictionary.reference.com/search?q=definition

A wiki is a collection of web pages designed to enable anyone who accesses it to contribute or modify content, using a simplified markup language. Wikis are often used to create ...
http://en.wikipedia.org/wiki/Wiki