plural of Fly

(informal) A disc-shaped unidentified flying object or UFO; originally in reference to sightings by aviator Kenneth Arnold in Washington in 1947.

(archaic) A dragonfly.

Alternative spelling of barfly

A small, independent, military land unit capable of rapid mobility, often using guerrilla tactics against a larger force.

Any tropical marine fish of the family Dactylopteridae, having immense wing-like pectoral fins used to glide through the water.

Any activity involving aviation for recreation and competition. Flying sports include air racing, homebuilt aircraft, ultralight aviation, and hot-air ballooning.

(rugby) A rugby player who is normally the first receiver of the ball from the scrum half after a scrum; a half-back.

Any of several dipterous insects particularly in the families Tephritidae and Drosophilidae whose larvae burrow into apples.

A large Australasian bat, of the genera Pteropus or Acerodon in the family Pteropodidae, having a fox-like face. / Any bat of the family Pteropodidae (see Usage notes).