FLY

noun

1. Any insect of the order Diptera; characterized by having two wings (except for some wingless species), also called true flies.
2. (non-technical) Especially, any of the insects of the family Muscidae, such as the common housefly (other families of Diptera include mosquitoes and midges).
3. Any similar, but unrelated insect such as dragonfly or butterfly.