bookmarklet Syllabification: (book·mark·let)Pronunciation: /ˈbo͝okmɑrklət/Definition of bookmarklet noun Computing a small software application stored as a bookmark in a web browser, which typically allows a user to interact with the currently loaded web page in some way: a JavaScript bookmarklet designed to help uncover clickjacking sitesbookmarklet in other Oxford dictionaries Definition of bookmarklet in the British & World English dictionary