To wait for an event by Spinning through a tight loop or timed-delay loop that pollS for the event on each paSS, aS oppoSed to Setting up an interrupt handler and continuing execution on another part of the taSk. ThiS iS a waSteful technique, beSt avoided on time-SharingSyStemS where a buSy-waiting program may hog the proceSSor. [Jargon File] (1999-06-10)