3. (noun)sleeper an unexpected achiever of success "the winner was a true sleeper--no one expected him to get it"
4. (noun)tie, railroad tie, crosstie, sleeper one of the crossbraces that support the rails on a railwaytrack "the British call a railroad tie a sleeper"
5. (noun)sleeping car, sleeper, wagon-lit a passenger car that has berths for sleeping
6. (noun)sleeper pajamas with feet; worn by children
7. (noun)sleeper a piece of furniture that can be opened up into a bed
8. (noun)sleeper, sleeper goby tropical fish that resembles a goby and rests quietly on the bottom in shallowwater
9. (noun)sleeper an unexpected hit "that movie was the sleeper of the summer"
Definition of 'sleeper'
Webster Dictionary
1. (noun)sleeper one who sleeps; a slumberer; hence, a drone, or lazy person
2. (noun)sleeper that which lies dormant, as a law
7. (noun)sleeper something lying in a reclining posture or position
8. (noun)sleeper 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
9. (noun)sleeper one of the joists, or roughly shaped timbers, laid directly upon the ground, to receive the flooring of the ground story
10. (noun)sleeper one of the knees which connect the transoms to the after timbers on the ship's quarter
11. (noun)sleeper the lowest, or bottom, tier of casks