burn in verb 4burn-in noun 3forms 4 verb4 •To fix and render durable, as colours, by means of intense heat. •(figurative) To imprint indelibly on the mind. •To exercise electrical components by means of burn-in. •To eat into, as fire. burn-in noun3 •A process by which an image becomes permanently imprinted on an electronic display such as a monitor. •The process by which components of a system are exercised prior to being placed in service (and sometimes before assembly), forcing certain failures to occur under supervised conditions. •The phase preceding a burn-out in which a worker's productivity and engagement with their work declines. formsburned in · burnt in · burning in · burns in