A person who sleeps in a particular way.
Some people are heavy sleepers, while others are light sleepers.
A person who is asleep.
The only sounds in the room were the snores of the sleepers.
A night train with beds for passengers.
We traveled on the sleeper train to save on hotel costs.
A coach on a train with beds for people to sleep in.
We booked a room in the sleeper car for our overnight journey.
A heavy piece of wood or concrete on which the rails on a railway track are laid.
The train tracks were laid on sturdy sleepers.
A film, play, or book that is not very successful for a long time and then suddenly becomes a success.
The movie was a sleeper hit, gaining popularity months after its release.
A spy who is sent to live in a country as a normal citizen and is not used until much later.
The authorities uncovered a sleeper agent living among us.
A ring or piece of metal that you wear in an ear that has been pierced to keep the hole from closing.
She wore a sleeper earring in her newly pierced ear.