Select the text/word to be defined in the current webpage. Right-clicking on the selected "text" shows two options, which perform "define:text" search with Google and Bing search engines. To define a word which is not in the webpage, click on the menu-item(Tools-->DefineIT) or the toolbar-button, which brings up a window. Enter the word to be defined in the textbox. The search engine to be used can be chosen using available 'radio-buttons'. Normal search can also be performed by selecting the checkbox provided. The search results appear in a new tab, which is focussed automatically.