overdosePronunciation: /ˈəʊvədəʊs/Translate overdose | into French | into German | into Italian | into Spanish Definition of overdose noun an excessive and dangerous dose of a drug:a fatal overdose of painkillers verb [no object] take an overdose of a drug:he was admitted to hospital after overdosing on cocaine [with object] give an overdose to: I think he had a quack doctor who overdosed himDerivatives overdosagePronunciation: /əʊvəˈdəʊsɪdʒ/ noun overdose in other Oxford dictionaries Definition of overdose in the US English dictionary