prelim /ˈpriːlɪm/noun 3adjective 1forms 1 noun3 •[in the plural] The preliminary front matter of a book; all content preceding the main text or work itself. •(informal) Something preliminary, such as a trial, report, race, etc. •[usually plural] (informal) Clipping of preliminary examination; a type of exam sat at the end of the first year of most undergraduate degrees. adjective1 •(informal) Preliminary. formsprelims