1. fast asleep - Adjective
2. fast asleep - Adjective Satellite
sleeping deeply
Source: WordNetlying fast asleep on the sofa Source: Internet
it would be cruel to wake him; he's sound asleep Source: Internet
However, if you're planning on using the system as a way of making sure they're not staying up late reading or playing video games, forget it – all they have to do is take off the band and the Fitbit app assumes they're fast asleep. Source: Internet
Mama would be more difficult, but she took so many sleeping pills, she’d be fast asleep, steeped in her jasmine and geranium essences. Source: Internet
So I kick up my feet, have a snack, and vow to stay up late catching up on a book I've been trying to finish or a show I'm behind on, but four seconds later I'm fast asleep, remote in hand. Source: Internet
By the time my husband arrived, my daughter was fast asleep, and I was feeling more hopeful. Source: Internet