Standard Lemma guide

NREM

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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  • UK: /ˈɛnɹɛm/
  • UK: /ˈɛnɑːiːˌɛm/

1

noun

Meaning 1

Non-rapid eye movement, non-REM; designating the stage or stages of sleep when there is no dreaming and brain activity is reduced.

Definition source: English Wiktionary via Wiktextract

Usage: attributive, uncountable

Topics: medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a recurring sleep state during which rapid eye movements do not occur and dreaming does not occur; accounts for about 75% of normal sleep time

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: orthodox sleep, nonrapid eye movement sleep, NREM sleep, nonrapid eye movement

Antonyms: none provided

Broader terms: sleep, slumber

History

Etymology

Initialism of non-rapid eye movement.