Simple Definition of pest
: an animal or insect that causes problems for people especially by damaging crops
: a person who bothers or annoys other people
Full Definition of pest
pestyplay \ˈpes-tē\ adjective
Examples of pest in a sentence
These insects are pests for farmers.
mice and other household pests
You're being a real pest. Would you leave us alone, please?
Origin and Etymology of pest
Middle French peste, from Latin pestis
First Known Use: 1513
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