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.

We often think of anesthesia as putting us in a deep sleep.

From The Wall Street Journal • Jun. 3, 2026

The anesthetized patients’ brains produced activity that shared similarities to being unconscious in a coma—as well as deep sleep, REM sleep and patterns unique to anesthesia.

From The Wall Street Journal • Jun. 3, 2026

REM sleep involves intense dreaming and brain activity that resembles wakefulness, yet people often report that this stage still feels like deep sleep.

From Science Daily • Mar. 26, 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