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