deep sleep

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Though we often think of anesthesia as putting us in a deep sleep, new research suggests it could actually be closer to being in a coma than previously thought.

From The Wall Street Journal • Jun. 5, 2026

Following Miller’s first house call, Sugar spent the rest of the day in a deep sleep.

From The Wall Street Journal • May 17, 2026

Both deep sleep and REM sleep were significantly shorter, and participants spent an additional 15 minutes awake during the night.

From Science Daily • Feb. 4, 2026

During a typical night, the brain cycles repeatedly through deep sleep and REM sleep.

From Science Daily • Feb. 4, 2026

Then he fell into a deep sleep, and this time no one could rouse him.

From "The Ear, the Eye, and the Arm" by Nancy Farmer