1. A serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal (synset 114162173)
  2. Any epidemic disease with a high death rate (synset 114099961)
  3. A persistently annoying person (synset 110439375)
  4. Any unwanted and destructive insect or other animal that attacks food or crops or livestock etc. (synset 101316879)
    "he sprayed the garden to get rid of pests"; "many pests have developed resistance to the common pesticides"

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