reheat Syllabification: (re·heat)Translate reheat | into French | into German | into Italian | into Spanish Definition of reheat verb Pronunciation: /rēˈhēt/ [with object] heat (something, especially cooked food) again. noun Pronunciation: /ˈrēhēt/ the process of using the hot exhaust to burn extra fuel in a jet engine and produce extra power. an afterburner. Derivatives reheater noun reheat in other Oxford dictionaries Definition of reheat in the British & World English dictionary