Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun orthodox_sleep

1 sense of orthodox sleep

Sense 1
orthodox sleep, nonrapid eye movement sleep, NREM sleep, nonrapid eye movement, NREM -- (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)
       => sleep, slumber -- (a natural and periodic state of rest during which consciousness of the world is suspended; "he didn't get enough sleep last night"; "calm as a child in dreamless slumber")