16. A method of displaying semantically associated text search results using a text index comprising: one or more content records corresponding to an electronic document, the content records identifying one or more text terms present within the electronic document; one or more term association records associating a text term present within the electronic document identified by a content record with a pre-determined semantic definition of the text term; one or more content association records linking a term association record of the one or more term association records with a content records of the one or more content records; said method comprising: enabling a user to select, in a search engine, one or more user-defined text search terms desired to be located within the text index; for user-defined text search terms having term association records within the text index, iteratively presenting to the user a list of pre-determined semantic definitions associated with each of the one or more user-defined text search terms and enabling the user to select a pre-determined semantic definition of those one or more user-defined text search terms; searching the content association records contained within the text index using the user-defined text search terms to locate electronic documents previously catalogued as containing the one or more user-defined text search terms in association with the selected pre-determined semantic definition, to form a semantically relevant results set; displaying the semantically relevant results set to the user; and updating or creating a new content association record during the use of the text index by associating a particular electronic document with the user-defined text search terms, and selected pre-determined semantic definition of the user-defined text search terms, used to locate the particular electronic document, and wherein one or more term association records are updated or created during the use of the text index by enabling the user to select pre-determined semantic definitions for association with user-defined text search terms.
16. A method of displaying semantically associated text search results using a text index comprising: one or more content records corresponding to an electronic document, the content records identifying one or more text terms present within the electronic document; one or more term association records associating a text term present within the electronic document identified by a content record with a pre-determined semantic definition of the text term; one or more content association records linking a term association record of the one or more term association records with a content records of the one or more content records; said method comprising: enabling a user to select, in a search engine, one or more user-defined text search terms desired to be located within the text index; for user-defined text search terms having term association records within the text index, iteratively presenting to the user a list of pre-determined semantic definitions associated with each of the one or more user-defined text search terms and enabling the user to select a pre-determined semantic definition of those one or more user-defined text search terms; searching the content association records contained within the text index using the user-defined text search terms to locate electronic documents previously catalogued as containing the one or more user-defined text search terms in association with the selected pre-determined semantic definition, to form a semantically relevant results set; displaying the semantically relevant results set to the user; and updating or creating a new content association record during the use of the text index by associating a particular electronic document with the user-defined text search terms, and selected pre-determined semantic definition of the user-defined text search terms, used to locate the particular electronic document, and wherein one or more term association records are updated or created during the use of the text index by enabling the user to select pre-determined semantic definitions for association with user-defined text search terms. 22. The method of claim 16 wherein a user interface displaying the semantically relevant results set uses a browser plug-in in conjunction with the search engine, and the browser plug-in in addition operates in conjunction with the search engine connects by network to the text index.