1. [ noun ] the state of being asleep
Related terms: waking sleep dream sleep
2. [ noun ] quiet and inactive restfulness
Synonyms: quiescency dormancy quiescence
Related terms: ease vegetation
3. [ adjective ] lying asleep
Synonyms: slumbering

"don't wake the sleeping children" "gazed with affection at his slumbering form"

Related terms: asleep
4. [ adjective ] (heraldry) lying with head on paws as if sleeping
Synonyms: dormant
Related terms: heraldry unerect
5. [ noun ] (biology) the suspension of consciousness and decrease in metabolic rate
Related terms: bodily_process sleep_talking doze nap sleepwalking
Similar spelling:   sloping