Definition of infest in English:


Line breaks: in¦fest
Pronunciation: /ɪnˈfɛst


[with object]
(Of insects or animals) be present (in a place or site) in large numbers, typically so as to cause damage or disease: the house is infested with cockroaches (as adjective, in combination -infested) shark-infested waters
More example sentences
  • Fleas infest the animal (rats, but other rodents as well), and these fleas move freely over to human hosts.
  • His McGill ghetto apartment is infested with mice and, try as he might, he can't seem to get rid of them.
  • The species was believed to have been wiped out in 1918 when rats infested their home island.
overrun, spread through, take over, overspread, swarm over, crawl over, run riot over;
invade, penetrate, infiltrate, pervade, permeate, inundate, overwhelm;
beset, pester, plague
rare vermined


late Middle English (in the sense 'torment, harass'): from French infester or Latin infestare 'assail', from infestus 'hostile'. The current sense dates from the mid 16th century.



Pronunciation: /-ˈsteɪʃ(ə)n/
More example sentences
  • Campaigners warn that Britain's streets could be plagued by vermin infestations if people continue to dump their rubbish irresponsibly.
  • Movies about the end of the world or uncontrollable plagues and infestations are huge box office successes.
  • Indeed, worm infestations, lice and a variety of other health problems plague the residents of the water villages.

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