Definitions
1.NounAn arthropod (in the Insecta class) characterized by six legs, up to four wings, and a chitinous exoskeleton."Our shed has several insect infestations, including ants, yellowjackets, and wasps."
2.NounAny small, creeping, crawling, or slithering animal, excluding mammals, birds, and fish.
An arthropod or invertebrate.
3.NounAn arthropod or invertebrate.
4.NounA contemptible or powerless person."The manager’s assistant was the worst sort of insect."