See the Glossary definition of stopword . Search Refine . Refers to methods used to improve a search after initial results are returned. Search Limits . Fields refers to the ability to restrict searches to particular URLs, domains, linking sites, countries, or categories like graphics and audio files.
Language refers to the ability to limit search results by language.
Categories refers to the ability to limit searches to a particular category from a listed set of categories. This often limits the search to only those pages that have been reviewed and categorized, not the complete set. Proximity refers to the ability to search for adjacent terms or terms within a certain range of words. Nearly every search engine allows denoting consecutive words in phrases by using double quote marks around them. ODP refers to the Open Directory Project, a Yahoo-like subject directory shared among many engines.