o·ver·sleep /ˌəʊvəˈsliːp $ ˌoʊvər-/ verb (past tensepst and past participlepp overslept /-ˈslept/) [intransitiveI] WAKE UP/GET UPto sleep for longer than you intended 睡过头，睡得过久 Sorry I’m late. I overslept. 很抱歉我迟到了，我睡过头了。
► see thesaurus at sleep → sleep in at sleep1 oversleep• Sorry I'm late - I overslept.• Yet he ended his days at daily mass, even serving for the priest when the altar boy of the day overslept.• Why are you so late? Did you oversleep again?• They were afraid of oversleeping and missing the plane.• He had overslept on the day he was supposed to take the entrance exam.