Disambiguation refers to the removal of ambiguity by making something clear. Disambiguation narrows down the meaning of words. This word makes sense if you break it down. Dis means "not," ambiguous means "unclear," and the ending -tion makes it a noun. So disambiguation is the act of making something clear.

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.

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

"Wiki" is usually not a proper name and, when it is, it does not refer to Wikipedia. Please understand that "wiki" is a generic term that describes a type of website or software. The term "wiki" refers to a type of site patterned after C2 Wiki, the original site to use the term "wiki" (an abbreviation of WikiWikiWeb).