overdoPronunciation: /əʊvəˈduː/Translate overdo | into French | into German | into Italian | into Spanish Definition of overdo verb (overdoes, overdoing; past overdid; past participle overdone) [with object] do, use, or carry to excess; exaggerate:she rather overdoes the early cockney scenes I’d overdone the garlic in the curry (overdo it/things) exhaust oneself by overwork or overexertion:I’d simply overdone it in the gym overcook. Origin: Old English oferdōn (see over-, do1)overdo in other Oxford dictionaries Definition of overdo in the US English dictionary