📖 WordNook

sleeper

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
    sleeper goby
  3. a piece of furniture that can be opened up into a bed
  4. pajamas with feet
  5. a passenger car that has berths for sleeping
    sleeping carwagon-lit
  6. one of the cross braces that support the rails on a railway track
    “the British call a railroad tie a sleeper”
    tierailroad tiecrosstie
  7. a rester who is sleeping
    slumberer
  8. an unexpected achiever of success
    “The winner was a true sleeper--no one expected them to get it.”
  9. 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