Definition of leech noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//liːtʃ//
    ; NAmE NAmE//liːtʃ//
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  1. 1 a small worm that usually lives in water and that attaches itself to other creatures and sucks their blood. Leeches were used in the past by doctors to remove blood from sick people. See related entries: Invertebrates
  2. 2(disapproving) a person who depends on somebody else for money, or takes the profit from somebody else’s work
  3. Word OriginOld English lǣce, lȳce; related to Middle Dutch lake, lieke.
See the Oxford Advanced American Dictionary entry: leech