- a person or animal that sleeps, esp. as specified: a sound sleeper
- a timber or beam laid horizontally, as on the ground, to support something above it
- any of a number of strips of wood, laid as on a concrete subfloor, to which finished flooring is attached
- Chiefly Brit. a tie supporting a railroad track
- sleeping car
- a sofa or upholstered chair designed to convert easily to a bed, typically by means of a built-in foldout cot beneath its cushions
- a previously disregarded person or thing that unexpectedly achieves success, assumes importance, etc.
- mole (sense )
- a terrorist who infiltrates a society, a government agency, etc. long before taking action
- [often pl.] a kind of pajamas for infants and young children, that enclose the feet
- bunting (sense )
- Bowling a pin standing directly behind, and hidden by, another after the first bowl of a frame
Origin of sleeperMiddle English slepere from Old English slæpere
of or having to do with a sleeper (sense ): a sleeper cell
- One that sleeps: a heavy sleeper who was not wakened by the burglar.
- A sleeping car.
- often sleepers Children's pajamas, usually with legs that cover the feet.
- a. One that achieves unexpected recognition or success, as a racehorse or movie.b. A spy or saboteur who is planted in an enemy country and who lives unobtrusively as a citizen of that country until activated into clandestine operations by a prearranged signal.
- A horizontal structural member on or near the ground that supports weight.
- Chiefly British A railroad crosstie.
- Any of various chiefly tropical fishes of the family Eleotridae of fresh, brackish, and shallow marine waters, resembling the gobies but without fused pelvic fins and noted for their habit of lying immobile.
- Someone who sleeps.
- I'm a light sleeper: I get woken up by the smallest of sounds.
- She's a heavy sleeper: it takes a lot to wake her up.
- That which lies dormant, as a law.
- A spy, saboteur, or terrorist who lives unobtrusively in a community until activated by a prearranged signal; may be part of a sleeper cell.
- A railroad sleeping car.
- We spent a night on an uncomfortable sleeper between Athens and Vienna.
- Something that achieves unexpected success after an interval of time.
- A box-office bomb when it first came out, the film was a sleeper, becoming much more popular decades after being released.
- A goby-like bottom-feeding freshwater fish of the family Odontobutidae.
- A nurse shark.
- A type of pajama for a person, especially a child, that covers the whole body, including the feet.
- Aaron, Devin, and Laura looked so comfy in their sleepers.
- (slang) 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, or to avoid the attention of the police.
sleep +"Ž -er