Definition of infestation noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌɪnfeˈsteɪʃn//
; NAmE NAmE//ˌɪnfeˈsteɪʃn//
[countable, uncountable]
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a large number of insects, rats, etc. living in a place where they are not wanted, often causing damage or disease an infestation of lice Scientists are checking for both insect and fungal infestation.