Sleep is a naturally recurring state of mind and body, characterized by altered consciousness, relatively inhibited sensory activity, reduced muscle activity and inhibition of nearly all voluntary muscles during rapid eye movement sleep, and reduced interactions with surroundings.

What is the full meaning of sleep?

Rating. SLEEP. Stress Level Elimination Exercise Plan. Medical » Physiology.

What does it mean to be sleeping in?

Definition of sleep in (Entry 2 of 2) intransitive verb. 1 : to sleep where one is employed. 2a : oversleep. b : to sleep late intentionally.