sleeper

/'sli:pə/
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sleeper

The movie was the sleeper hit of the summer.

Definition
  1. Noun:
    • A person who is asleep: Someone who is in a state of sleep.
    • A railroad tie: A rectangular support, typically made of wood or concrete, laid crosswise under and supporting the rails on a railway track.
    • A sleeping car: A railway passenger car equipped with berths or beds for overnight travel.
    • An unexpected success: A person or thing that achieves unexpected success or popularity, often after an initially quiet or unnoticed period.
    • A spy or agent: A person who lives unobtrusively in a foreign country, often for a long period, before being activated for espionage or sabotage.
    • A type of pajama: A one-piece garment for sleeping, especially for children, that covers the feet.
    • A type of fish: A bottom-dwelling marine fish that remains still on the seafloor.
    • A piece of furniture: A sofa or couch that can be converted into a bed.
Usage Examples
  • Noun:
    • He is a heavy sleeper and didn't hear the alarm. (Referring to a person who sleeps deeply.)
    • Workers replaced the rotten wooden sleeper on the track. (Referring to a railroad tie.)
    • We booked a compartment in the sleeper for the overnight journey. (Referring to a sleeping car.)
    • That low-budget film was the summer's biggest sleeper. (Referring to an unexpected hit.)
    • The agency had a sleeper living in the capital for a decade. (Referring to a dormant spy.)
    • The toddler wore warm sleepers on cold nights. (Referring to footed pajamas.)
    • We saw a sleeper resting on the sandy bottom while snorkeling. (Referring to the fish.)
    • The small apartment has a sleeper sofa for guests. (Referring to a convertible bed.)
Advanced Usage
  • "Sleeper hit": A film, song, or other product that becomes a surprise success.

    • The indie game became a sleeper hit, selling millions of copies.
  • "Sleeper cell": A covert group of spies or terrorists who remain inactive until given orders.

    • Intelligence agencies worked to dismantle the sleeper cell.
  • "Sleeper effect": A phenomenon where a persuasive message has a delayed impact, becoming more effective over time.

    • The advertisement had a sleeper effect, influencing opinions weeks later.
Variants and Related Words
  • Sleep (verb/noun): The state or act of resting naturally with suspended consciousness.
  • Sleepy (adjective): Needing or ready for sleep; drowsy.
  • Sleeping (adjective/noun): The condition of being asleep.
  • Sleepover (noun): A party where guests stay overnight at a friend's house.
Synonyms
  • Dark horse: A competitor about whom little is known but who unexpectedly wins or succeeds.
  • Berth: A bunk or bed on a ship, train, or other vehicle.
  • Crosstie: Another term for a railroad sleeper or tie.
  • Mole: A spy who infiltrates an organization and establishes a long-term position.
Related Phrases (Phrasal Verbs)

(Note: "Sleeper" is primarily a noun. Common phrasal verbs are formed with its root, "sleep.") - Sleep in: To sleep later than usual in the morning. - I like to sleep in on weekends. - Sleep over: To stay overnight at someone else's house. - The children are going to sleep over at their cousin's.

Related Idioms
  • A sleeper must be awakened: An idiom suggesting that a person with potential must be roused to action or awareness.
    • He has so much talent, but he's like a sleeper who must be awakened.
  • To buy a sleeper: To purchase something (often a stock or antique) that is undervalued and later increases in worth.
    • He bought the painting for a small sum; it was a real sleeper and is now very valuable.
sleeper

The movie was the sleeper hit of the summer.

Noun
  1. an unexpected hit
    • that movie was the sleeper of the summer
  2. tropical fish that resembles a goby and rests quietly on the bottom in shallow water
  3. a piece of furniture that can be opened up into a bed
  4. pajamas with feet; worn by children
  5. a passenger car that has berths for sleeping
  6. one of the cross braces that support the rails on a railway track
    • the British call a railroad tie a sleeper
  7. an unexpected achiever of success
    • the winner was a true sleeper--no one expected him to get it
  8. 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
  9. a rester who is sleeping