pest

/pˈɛst/

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Definitions

Noun
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
Noun
any epidemic disease with a high death rate
Noun
a persistently annoying person
Noun
any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.; "he sprayed the garden to get rid of pests"; "many pests have developed resistance to the common pesticides"