Definition
To be in a state of deep sleep or unconsciousness, especially sleeping very soundly.
沉睡
By the end of the match, the boxer was out for the count.
比赛结束时，拳击手已经昏迷不醒。
I was so tired last night that I was out for the count as soon as my head hit the pillow.
昨晚我太累了，头一碰到枕头就睡得不省人事。
After a full day of hiking, they were all out for the count.
经过一整天的徒步旅行，他们全都睡得不省人事。