|Origin:||infester, from Latin, from infestus 'angry and unfriendly'|
in‧fest [transitive usually passive]
if insects, rats etc infest a place, there are a lot of them and they usually cause damage
be infested with something
The kitchen was infested with cockroaches.
if things or people you do not want infest a place, there are too many of them:
an area infested with holiday homes
—infestation noun [uncountable and countable]