What is guide words in a dictionary?

Guide words are words that appear at the top of each page in a dictionary, representing the first and last words on that page. These words help users quickly find the word they are looking for without having to look through every word on the page. The first guide word is typically the first word that appears on the page, while the second guide word is the last word that appears on the page. Guide words can also indicate the start and end of a particular section or range of words in the dictionary. For example, the guide words "apple" and "armadillo" on one dictionary page might indicate that all the words on that page start with the letters "A" or "B" and that the word "banana" would be found on the same page.