Pest

n. something that harms plants; nuisance, someone or something annoying; nagger

Pest may refer to:Pest, an archaic term for pestilence, specifically the Black deathPest (hockey), an ice hockey player specialising in aggravating opponentsPest (music), a British music groupPest (organism), a characteristically undesirable animal or insectPest controlThe Pest (1917 film), a 1917 film starring Oliver HardyThe Pest (1997 film), a 1997 film starring John LeguizamoPEST analysis (Political, Economic, Social and Technological), a framework for analysis of macroenvironmental factors
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PEST analysis stands for "Political, Economic, Social, and Technological analysis" and describes a framework of macroenvironmental factors used in environmental scanning. It is also referred to as the STEP, STEEP, PESTEL, PESTLE or LEPEST (or Political, Economic, Socio-cultural, Technological, Legal, Environmental). Recently it was even further extended to STEEPLE and STEEPLED, including ethics and demographics.
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Pest n. 1. An injurious plant or animal, especially one harmful to humans. 2. A deadly epidemic disease; a pestilence. pest 1. [more]Pest - Community and Resources

Noun
1. a persistently annoying person
(synonym) blighter, cuss, pesterer, gadfly
(hypernym) tormentor, tormenter, persecutor
(hyponym) nudnik, nudnick

n. pest, nuisance, something annoying; pestilence, epidemic disease, plague