Definition of Sleeper

1. Noun. A rester who is sleeping.

Exact synonyms: Slumberer
Specialized synonyms: Dreamer, Rip Van Winkle, Sleeping Beauty, Noctambulist, Sleepwalker, Somnambulist, Snorer, Somniloquist
Generic synonyms: Rester
Derivative terms: Sleep, Slumber

2. Noun. 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.
Category relationships: Act Of Terrorism, Terrorism, Terrorist Act
Group relationships: Sleeper Nest
Generic synonyms: Diversionist, Saboteur, Wrecker, Spy, Undercover Agent, Terrorist

3. Noun. An unexpected achiever of success. "The winner was a true sleeper--no one expected him to get it"
Generic synonyms: Achiever, Succeeder, Success, Winner

4. Noun. One of the cross braces that support the rails on a railway track. "The British call a railroad tie a sleeper"
Exact synonyms: Crosstie, Railroad Tie, Tie
Generic synonyms: Brace, Bracing
Group relationships: Railroad, Railroad Track, Railway

5. Noun. A passenger car that has berths for sleeping.
Exact synonyms: Sleeping Car, Wagon-lit
Terms within: Drawing Room, Roomette
Generic synonyms: Carriage, Coach, Passenger Car
Derivative terms: Sleep

6. Noun. Pajamas with feet; worn by children.
Generic synonyms: Jammies, Pajama, Pj's, Pyjama

7. Noun. A piece of furniture that can be opened up into a bed.
Generic synonyms: Article Of Furniture, Furniture, Piece Of Furniture
Derivative terms: Sleep

8. Noun. Tropical fish that resembles a goby and rests quietly on the bottom in shallow water.
Exact synonyms: Sleeper Goby
Generic synonyms: Percoid, Percoid Fish, Percoidean
Group relationships: Eleotridae, Family Eleotridae

9. Noun. An unexpected hit. "That movie was the sleeper of the summer"
Generic synonyms: Bang, Hit, Smash, Smasher, Strike
Language type: Figure, Figure Of Speech, Image, Trope

Definition of Sleeper

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

2. n. Something lying in a reclining posture or position.

Definition of Sleeper

1. Noun. Someone who sleeps. ¹

2. Noun. A saboteur or terrorist who lives unobtrusively in a community until activated by a prearranged signal; may be part of a sleeper cell. ¹

3. Noun. A railroad sleeping car. ¹

4. Noun. (rail transport British) A railroad tie. The short wooden bars are '''sleepers''', and the long metal bars are railway lines. ¹

5. Noun. (carpentry) A structural beam in a floor running perpendicular to both the joists beneath and floorboards above. ¹

6. Noun. (nautical) A heavy floor timber in a ship's bottom. ¹

7. Noun. Something that achieves unexpected success after an interval of time. ¹

8. Noun. A goby-like bottom-feeding freshwater fish of the family Odontobutidae. Also "sleeper goby." ¹

9. Noun. A type of pajama for a person, especially a child, that covers its whole body, including their feet. ¹

10. Noun. An automobile which, not too quick out of the factory has been internally modified to excess, while retaining a mostly stock appearance in order to fool opponents in a drag race. ¹

¹ Source:

Definition of Sleeper

1. one that sleeps [n -S] - See also: sleeps

Medical Definition of Sleeper

1. 1. One who sleeps; a slumberer; hence, a drone, or lazy person. 2. That which lies dormant, as a law. 3. A sleeping car. 4. An animal that hibernates, as the bear. 5. A large fresh water gobioid fish (Eleotris dormatrix). A nurse shark. See Nurse. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Sleeper

sleep stages
sleep talking
sleep terror
sleep terror disorder
sleep tight
sleep under the same bridge
sleep with the fishes
sleeper (current term)
sleeper berth
sleeper cell
sleeper cells
sleeper goby
sleeper nest

Literary usage of Sleeper

Below you will find example usage of this term as found in modern and/or classical literature:

1. Lawyers' Reports Annotated by Lawyers Co-operative Publishing Company (1911)
"It does not appear from the statement of facts that appellee was paid anything by the Pullman Company for hauling its sleeper, in view of which, ..."

2. Hebrew Literature: Comprising Talmudic Treatises, Hebrew Melodies and the by Epiphanius Wilson, Joseph Barclay, Samuel Liddell MacGregor Mathers, Alice Lucas (1901)
"O sleeper! wake, arise! Delusive follies shun, Keep from the ways of men and ... O sleeper! rise and call upon thy God ! Behold the firmament His hands have ..."

3. Knight's American Mechanical Dictionary: A Description of Tools, Instruments by Edward Henry Knight (1876)
"The ordinary English sleeper is 9 feet long, 10 Inches wide, and 6 inches thick ; the distance apart is from 2} to 3 feet. On some of the English railways, ..."

4. An Introduction to Poetry by Jay Broadus Hubbell, John Owen Beaty (1922)
"Although "The Raven" is the best known of these, "The sleeper" was, ... THE sleeper At midnight, in the month of June, I stand beneath the mystic moon. ..."

5. The Rudiments of Civil Engineering by Henry Law, George Rowdon Burnell, Daniel Kinnear Clark (1884)
"The form of the sleeper is strong, it holds **' 7i-Bowl ... One of the first of them was the Couillet sleeper, like I in section, 7 inches wide, ..."

6. Genealogical and Family History of the State of New Hampshire: A Record of by Ezra Scollay Stearns, William Frederick Whitcher, Edward Everett Parker, Lewis Publishing Company, Lewis publishing company, Chicago (1908)
"Colonel sleeper died in Bristol, September n. 1826. He married Mary Sanborn, daughter of Daniel Sanborn, of Kensington. New Hampshire, and her death ..."

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