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  1. Pest (organism) - Wikipedia

    A pest is any organism harmful to humans or human concerns. The term is particularly used for creatures that damage crops, livestock, and forestry or cause a nuisance to people, especially …

  2. Pest | Rodents, Insects, & Disease Prevention | Britannica

    Pest, any organism judged as a threat to human beings or to their interests. When early man hunted animals and foraged for food, he shared the natural resources with other organisms in …

  3. PEST Definition & Meaning - Merriam-Webster

    The meaning of PEST is an epidemic disease associated with high mortality; specifically : plague. How to use pest in a sentence.

  4. What Is Considered a Pest? Definition & Examples

    Aug 22, 2025 · A pest is any living thing that causes problems for people, their property, or their interests. This broad classification includes organisms from microscopic pathogens to larger …

  5. PEST | definition in the Cambridge English Dictionary

    PEST meaning: 1. an insect or small animal that is harmful or damages crops: 2. an annoying person, especially a…. Learn more.

  6. What Is Pest? – The Institute for Environmental Research and …

    Jun 18, 2025 · A pest is any organism – plant, animal, or microbe – that interferes with human activities, causing economic damage, spreading disease, or simply being a nuisance.

  7. PEST definition in American English | Collins English Dictionary

    A pest is an insect or small animal which damages crops or food supplies.

  8. pest noun - Definition, pictures, pronunciation and usage notes ...

    Definition of pest noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

  9. What is a Pest? - Purdue University

    Because some insects threaten human health, destroy food, damage structures or landscapes, or cause general annoyance or anxiety, they are considered pests.

  10. Pest - Oxford Reference

    Jan 2, 2026 · Any of various organisms, such as fungi, insects, rodents, and plants, that harm crops or livestock or otherwise interfere with the wellbeing of human beings.