1. the presence of a large number of insects or other pests in a place where they are not wanted

Examples

• The restaurant was closed due to a cockroach infestation.
• We discovered a termite infestation in the basement.
• The garden suffered from an aphid infestation this summer.
• Professional exterminators were called to handle the rat infestation.
• The old house had a serious ant infestation in the kitchen.
• Farmers struggled with a locust infestation that destroyed their crops.