A mechanism is provided for context based search disambiguation using existing category taxonomy. A client provides additional cues for search term disambiguation through the context of the specific user's browser. A bookmark or favorites data structure is sent along with the search term(s) to be disambiguated. The bookmark data structure acts as pre-existing category taxonomy for a clustering search engine to classify the results of the search. A viewed content history may also be sent along with the search terms to be disambiguated. The viewed content history acts as a cue to a clustering search engine to display as more relevant the results that are classified in the same category as the pages sent along with the search terms.