The condition of being kept awake and not getting enough sleep (perhaps forcibly by someone else, or by a sleep disorder), to the point of noticeably lower alertness.

Covered in sleet; full of sleet.

plural of sleeping pill

The property of being sleazy.

In a sleepy manner.

The property of being sleepy.

(pharmacology) A pill or tablet having a soporific effect.

(idiomatic, euphemistic, almost always preceded by the) Death.

present participle of sleep together

(transitive) To make more slender.