overburn verb 3noun 1forms 4 verb3 •To burn too much or for too long. •To record more than the usual available data capacity onto (an optical disc). •(figurative) To be overzealous. noun1 •(rare) An excessive burning.The furnace with the hickory wood was at a great heat and in danger of an overburn. — 1884 formsoverburned · overburnt · overburning · overburns