'Sleeper' definitions:

Definition of 'sleeper'

From: WordNet
noun
A rester who is sleeping [syn: sleeper, slumberer]
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
noun
An unexpected achiever of success; "the winner was a true sleeper--no one expected him to get it"
noun
One of the cross braces that support the rails on a railway track; "the British call a railroad tie a sleeper" [syn: tie, railroad tie, crosstie, sleeper]
noun
A passenger car that has berths for sleeping [syn: sleeping car, sleeper, wagon-lit]
noun
Pajamas with feet; worn by children
noun
A piece of furniture that can be opened up into a bed
noun
Tropical fish that resembles a goby and rests quietly on the bottom in shallow water [syn: sleeper, sleeper goby]
noun
An unexpected hit; "that movie was the sleeper of the summer"

Definition of 'Sleeper'

From: GCIDE
  • Sleeper \Sleep"er\, n.
  • 1. One who sleeps; a slumberer; hence, a drone, or lazy person. [1913 Webster]
  • 2. That which lies dormant, as a law. [Obs.] --Bacon. [1913 Webster]
  • 3. A sleeping car. [Colloq. U.S.] [1913 Webster]
  • 4. (Zool.) An animal that hibernates, as the bear. [1913 Webster]
  • 5. (Zool.) (a) A large fresh-water gobioid fish ({Eleotris dormatrix}). (b) A nurse shark. See under Nurse. [1913 Webster]

Definition of 'Sleeper'

From: GCIDE
  • Sleeper \Sleep"er\, n. [Cf. Norw. sleip a sleeper (a timber), as adj., slippery, smooth. See Slape.] Something lying in a reclining posture or position. Specifically: [1913 Webster] (a) 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. [1913 Webster] (b) One of the joists, or roughly shaped timbers, laid directly upon the ground, to receive the flooring of the ground story. [U.S.] [1913 Webster] (c) (Naut.) One of the knees which connect the transoms to the after timbers on the ship's quarter. [1913 Webster] (d) (Naut.) The lowest, or bottom, tier of casks. [1913 Webster]

Definition of 'sleeper'

From: GCIDE
  • Tetard \Te*tard"\, n. (Zool.) A gobioid fish (Eleotris gyrinus) of the Southern United States; -- called also sleeper. [1913 Webster]