Phrase guide

REM sleep

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

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

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: paradoxical sleep

Antonyms: none provided

2

noun

Meaning 2

a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: paradoxical sleep, rapid eye movement sleep, rapid eye movement, REM

Antonyms: none provided

Broader terms: sleep, slumber

History

Etymology

No etymology was provided for this word.

Across languages

Translations

21 source translations are retained for this English entry.

  • Finnish: vilkeuni — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • French: sommeil paradoxal — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Georgian: REM ძილი (REM ʒili) — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Georgian: სწრაფი ძილი (sc̣rapi ʒili) — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Georgian: ძილი თვალების სწრაფი მოძრაობით (ʒili tvalebis sc̣rapi moʒraobit) — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Georgian: თვალების სწრაფი მოძრაობის ძილი (tvalebis sc̣rapi moʒraobis ʒili) — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Georgian: პარადოქსული ძილი (ṗaradoksuli ʒili) — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • German: REM-Schlaf — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • German: REM-Phase — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • German: paradoxer Schlaf — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • German: desynchronisierter Schlaf — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Greek: ύπνος REM (ýpnos REM) — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Icelandic: bliksvefn — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Icelandic: kviksvefn — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Icelandic: hrjúfur svefn — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Polish: faza REM — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Russian: фаза быстрого сна (faza bystrovo sna) — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Russian: БДГ-фаза (BDG-faza) — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Russian: REM-фаза (REM-faza) — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Swedish: drömsömn — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement
  • Swedish: REM-sömn — stage of sleep during which most brain activity and dreams occur, characterised by rapid eye movement