prelim Syllabification: (pre·lim)Pronunciation: /ˈprēˌlim/Definition of prelim noun informal 1an event that precedes or prepares for another, in particular. a preliminary examination, especially at a college. a preliminary round in an athletic competition:the prelims of the 400-meter free relay 2 (prelims) the pages preceding the main text of a book, including the title, contents, and preface. Origin: late 19th century: abbreviation of preliminaryprelim in other Oxford dictionaries Definition of prelim in the British & World English dictionary