deep sleep

Now the young man was not really dead, but only in a deep sleep.

For all of us getting a good night's deep sleep is important.

We are in deep sleep only two or three hours a night.

Finally, her mother seemed to fall into a deep sleep.

All the students and their teacher go into deep sleep.

Now we're going back to where live history left off, before the deep sleep.

She passed into a deep sleep once we got her in bed.

At which point she fell back into a deep sleep.

She took him through the dark back up to his room, and he fell into a deep sleep.

They all left the room, and I fell into a deep sleep.