an excessive and dangerous dose of a drug (药物)过量;危险的剂量 she took an overdose the day her husband left. 丈夫离开那天她服用了过量药物。
verb
[no obj.]take an overdose of a drug 用药过量 he was admitted to hospital after overdosing on cocaine. 他在过量使用可卡因后被送入医院。 ■[with obj.]give an overdose to 给…服过量的药