What does "rem sleep" mean?

The stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement (REM).

What is a synonym for "rem sleep"?

Common synonyms include: paradoxical sleep, rapid eye movement, rapid eye movement sleep, rem, rems.

noun

noun ·Rare ·Advanced level

Noun

1
The stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement (REM). uncountable, usually
2
a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep wordnet