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Definition of 'sponge'


  1. a porous mass of interlacing fibers the forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used
  2. someone able to acquire new knowledge and skills rapidly and easily; "she soaks up foreign languages like a sponge"
       Synonyms: quick study
  3. a follower who hangs around a host (without benefit to the host) in hope of gain or advantage
       Synonyms: leech parasite sponger
  4. primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies
       Synonyms: poriferan parazoan


  1. wipe with a sponge, so as to clean or moisten
  2. ask for and get free; be a parasite
       Synonyms: mooch bum cadge grub
  3. erase with a sponge; as of words on a blackboard
  4. soak up with a sponge
  5. gather sponges, in the ocean

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