overheat UK /ˌəʊvəˈhiːt/US /ˌoʊvɚˈhit/verb 3noun 1forms 3 verb3 •To heat excessively.'Made one quite thankful to get back to the fug, though as a rule I think the way these trains are overheated is something scandalous'. — 1934 •To become excessively hot. •To grow too quickly in an uncontrolled way.Dalio said that the Chinese economy was in danger of overheating, and somebody asked how a Chinese slowdown would affect the price of oil and other commodities. — 2011 noun1 •A condition of being overheated.Continued operation with an overheat could lead to other serious problems, perhaps even a fire. — 2002 formsoverheated · overheating · overheats