Pest (organism)

A pest is “a plant or animal detrimental to humans or human concerns (as agriculture or livestock production)”; alternative meanings include organisms that cause nuisance and epidemic disease associated with high mortality. In its broadest sense, a pest is a competitor of humanity. In the past, the term might have been used for detrimental animals only, thus for example, causing confusion where the generic term ‘pesticide’ meant ‘insecticide’ to some people.