sleeping
n. uncountablen. the natural state of rest where your body and mind are inactive. You do this every night to stay healthy and feel fresh.
n. the natural, periodic state of rest for the mind and body, characterized by the absence of consciousness and the suspension of sensory activity.
I need eight hours of sleeping every night to feel good.
The doctor explained that regular sleeping patterns are essential for maintaining a strong immune system and mental clarity.
While the physiological necessity of sleeping is well-documented, the specific neurological mechanisms that govern the transition between various dream states remain a subject of intense scientific debate.
Typically functions as a gerund-noun; often used in compound nouns like 'sleeping bag' or 'sleeping pill'.