An image search engine server that comprises an image search engine, capable of performing image searches based on the context of a search operation. The context of the search is derived from a built-in thesaurus and/or a dictionary. For a thesaurus-based algorithm, the approach is to send a query back to the user, who can select the image search domain, sub-domain, and other hierarchical search refinements from one or more dropdown menus. The items in the dropdown menus that the user selects during the “query back” are used to augment the search string entered by the user to better refine the image search. If the user entered search string is a single string of dictionary word or words or the dictionary mode is elected, then synonyms for that search string are used to generate the augmented search string for the final context-based search operation. By using the dictionary or thesaurus approach, a user search string can be augmented to result in improved image search results.