a pill or capsule containing a drug for inducing sleep.
a pill or tablet containing a sedative drug, such as a barbiturate, used to induce sleep
- Sleeping policeman
noun 1. a bump built across roads, esp in housing estates, to deter motorists from speeding Also road hump noun a speed bump or hump on the road
noun 1. a porch enclosed with glass or screening or a room with open sides or a row of windows used for sleeping in the open air.
noun 1. the act or process of learning during sleep by listening to recordings repeatedly.
adjective 1. without sleep: a sleepless night. 2. watchful; alert: sleepless devotion to duty. 3. always active: the sleepless ocean. adjective 1. without sleep or rest: a sleepless journey 2. unable to sleep 3. always watchful or alert 4. (mainly poetic) always active or moving: the sleepless tides