(attributive) Of a camp or event in which participants sleep away from home.

A camp or event in which participants sleep away from home.

An acute inflammation of the brain which causes drowsiness and mental disease.

Resembling or characteristic of sleep.

(dated) Sleepily; while falling asleep.

Oxyeleotris lineolata, a medium-sized freshwater fish native to tropical regions of northern Australia.

In Germany, June 27 is Siebenschläfertag (Seven Sleepers Day). The weather on that day is supposed to determine the average weather of the next seven weeks.

Suitable for sleeping.

(rare) The act of driving a vehicle while asleep and unaware of one's actions.

(rail transport, chiefly UK) A railroad tie.