Try Our Apps


Supposedly vs. Supposably

REM sleep

noun, Physiology
a recurrent period of sleep, typically totaling about two hours a night, during which most dreaming occurs as the eyes move under closed lids and the skeletal muscles are deeply relaxed.
Also called paradoxical sleep.
Compare slow-wave sleep.
Origin of REM sleep
1965-70 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source

Word of the Day

Difficulty index for REM sleep

Few English speakers likely know this word

Word Value for REM

Scrabble Words With Friends

Nearby words for rem sleep