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English definition of “leech”

leech

noun [C]     /liːtʃ/
a fat creature that lives in wet places and fastens itself onto the bodies of humans and animals to feed on their blood Worms, snails, slugs and similar animals disapproving a person who gives attention to someone over a long period in order to get their money or support Unpleasant people in generalUnpleasant men
(Definition of leech noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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