Sentence:  Given a text or hypertext document, we define “text <WSD>wikification</WSD>” as the task of automatically extracting the most important words and phrases in the document (keywords), and identifying for each such keyword the appropriate link to a Wikipedia article with detailed explanatory information about the corresponding keyphrase. ¶ Text <WSD>wikification</WSD> is performed in two steps. ... 
Meaning of the word marked with <WSD> tags:  The automated process of adding links to Wikipedia to specific words and phrases in an arbitrary text (e.g. a news article).