Definition of "insect" in English

noun

1. An arthropod (in the Insecta class) characterized by six legs, up to four wings, and a chitinous exoskeleton.

   • Our shed has several insect infestions, including ants, yellowjackets, and wasps.

2. (archaic or loosely) Any small arthropod similar to an insect, including spiders, centipedes, millipedes, etc.

   • The swamp is swarming with every sort of insect.

3. (derogatory) A contemptible or powerless person.

   • The manager’s assistant was the worst sort of insect.