on an aircraft, a seat designed to recline nearly horizontally, like a bed; on a train, a small sleeping compartment
noun 1. a seat, as on an airplane, that can be extended horizontally to permit sleeping.
- Sleeper terrorist
noun 1. a terrorist who is not currently active but assumes a guise in order to be in position, unsuspected, for future terrorist activities
- Sleep hygiene
noun 1. the habits conducive to getting the right amount and quality of sleep
adjective, sleepier, sleepiest. 1. ready or inclined to sleep; drowsy. 2. of or showing drowsiness. 3. languid; languorous: a sleepy gesture. 4. lethargic; sluggish: a sleepy brook. 5. quiet: a sleepy village. 6. inducing sleep; soporific: sleepy warmth. adjective sleepier, sleepiest 1. inclined to or needing sleep; drowsy 2. characterized by or exhibiting drowsiness, sluggishness, […]