A method for providing a dictionary service to a terminal, includes: providing a dictionary service window in or near a web browser for displaying a webpage through a screen of the terminal if a certain item for executing dictionary services in the terminal is clicked; (b) receiving a query inputted in the provided dictionary service window wherein the query includes a query for requesting meaning, a query for requesting pronunciation, or both; and (c) searching and providing a translation data corresponding to the query for requesting meaning or a pronunciation data corresponding to the query for requesting pronunciation. The method provides a translation data and/or pronunciation data of a word or expression which the user wants to find out while web surfing through the dictionary service window.