What is guide words in dictionary?

Guide words are used in a dictionary to indicate the first and last words on a page. They are usually printed at the top of the page in boldface type, and are meant to help users quickly locate the word they are looking for. Guide words are also known as entry words or page headers. In some dictionaries, the guide words are accompanied by a pronunciation guide and a part of speech label for each word. It is important to note that not all dictionaries use guide words, and some may use different methods for organizing and presenting words.