What does burn-in mean?

burn-in meaning in Law Dictionary

harm to some type of computer or tv display, due to being left on a long time or a reliability test by which a computer device is started up for a long period.

burn-in meaning in Business Dictionary

Procedure found in spotting weak components or circuits of an electronic product (such a computer) by running it at full-power in a hot and humid environment for extended periods (up to 30 days for crucial systems). This training is founded on the feeling that semiconductor devices frequently show their particular defects in the first couple of days or months of operation.