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English definition of “leech”

leech

noun [C] uk   /liːtʃ/ us  
a fat creature that lives in wet places and fastens itself onto the bodies of humans and animals to feed on their blood disapproving a person who gives attention to someone over a long period in order to get their money or support
(Definition of leech from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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