Dictionary.net

an unexpected hit; "that movie was the sleeper of the summer"

tropical fish that resembles a goby and rests quietly on the bottom in shallow water

a piece of furniture that can be opened up into a bed

a passenger car that has berths for sleeping

a rester who is sleeping

an unexpected achiever of success; "the winner was a true sleeper--no one expected him to get it"

a spy or saboteur or terrorist planted in an enemy country who lives there as a law-abiding citizen until activated by a prearranged signal

an unexpected hit; "that movie was the sleeper of the summer"

tropical fish that resembles a goby and rests quietly on the bottom in shallow water

a piece of furniture that can be opened up into a bed

a passenger car that has berths for sleeping

a rester who is sleeping

an unexpected achiever of success; "the winner was a true sleeper--no one expected him to get it"

One who sleeps; a slumberer; hence, a drone, or lazy person.

That which lies dormant, as a law.

A sleeping car.

An animal that hibernates, as the bear.

A large fresh-water gobioid fish (Eleotris dormatrix).

A nurse shark. See under Nurse.

Something lying in a reclining posture or position.

One of the pieces of timber, stone, or iron, on or near the level of the ground, for the support of some superstructure, to steady framework, to keep in place the rails of a railway, etc.; a stringpiece.

One of the joists, or roughly shaped timbers, laid directly upon the ground, to receive the flooring of the ground story.

One of the knees which connect the transoms to the after timbers on the ship's quarter.

The lowest, or bottom, tier of casks.

One who sleeps; a slumberer; hence, a drone, or lazy person.

That which lies dormant, as a law.

A sleeping car.

An animal that hibernates, as the bear.

A large fresh-water gobioid fish (Eleotris dormatrix).

A nurse shark. See under Nurse.

Something lying in a reclining posture or position.

One of the pieces of timber, stone, or iron, on or near the level of the ground, for the support of some superstructure, to steady framework, to keep in place the rails of a railway, etc.; a stringpiece.

One of the joists, or roughly shaped timbers, laid directly upon the ground, to receive the flooring of the ground story.

One of the knees which connect the transoms to the after timbers on the ship's quarter.

The lowest, or bottom, tier of casks.

A sleeping car.

One who sleeps.

A horizontal beam, as a support for rails, etc.

One who slumbers; a piece of timber laid at right angles to the rails of a railway track and supporting them; called also a tie; colloquially, a sleeping car.

One who sleeps: a horizontal timber supporting a weight, rails, etc.

n. One who sleeps; also, a drone or lazy person;-a piece of timber or stone on or near the level of the ground, for the support of some superstructure, as joists, or to steady rails or framework ;—one of the knees which connect the transoms to the after-timbers on the ship's quarter.