noun. the act or process of distinguishing between similar things, meanings, names, etc., in order to make the meaning or interpretation more clear or certain: Word sense disambiguation helps determine which meaning a word has in any given context.

Disambiguation in Wikipedia is the process of resolving conflicts that arise when a potential article title is ambiguous, most often because it refers to more than one subject covered by Wikipedia, either as the main topic of an article, or as a subtopic covered by an article in addition to the article's main topic.

Disambiguation distinguishes between different meanings of words. If you say the word joker, do you mean a playing card, a prankster, or a Batman villain? Disambiguation will clear things up. If you mention that you were playing poker, then it's clear which joker you're talking about.

disambiguated; disambiguating; disambiguates. transitive verb. : to clarify (something ambiguous) especially by providing or considering additional information.