Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “pest”


noun [C] uk   /pest/ us  
an insect or small animal that is harmful or damages crops: common pests such as rats, mice, or cockroachesGeneral and informal words for animals informal an annoying person, especially a child: Put that back, you little pest!Children and babies
(Definition of pest from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of pest?
Browse related topics

You are looking at an entry to do with General & informal words for animals, but you might be interested in these topics from the Animals generally topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “pest” in other dictionaries

Word of the Day


a measure for liquid equal to about half a litre

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More