Find the cheapest flights by comparing hundreds of airlines and travel sites in just one search. compare now and save at fly.com! True flies are insects of the order diptera (di = two and ptera = wings). a scan of a house fly taken at 40 magnifications under a scanning electron microscope.. Fly definition at dictionary.com a free online dictionary with pronunciation synonyms and translation. look it up now! Translations of fly. fly synonyms fly antonyms. information about fly in the free online english dictionary and encyclopedia. tsetse fly the fly. Fly n. pl. flies . any of numerous two-winged insects of the order diptera especially any of the family muscidae which includes the housefly Fly v. flew flown flying flies . v.intr. to engage in flight especially: to move through the air by means of wings or winglike parts Fly (plural flies) (zoology) any insect of the order diptera; characterized by having two. birds of passage fly to warmer regions as it gets colder in winter.. Meubles fly est la 1ere enseigne française de mobilier jeune habitat. découvrez les nouveautés de mobilier design contemporain pop et nature dans nos 130 magasins. Retailer of clothing gifts home furnishings and fly fishing gear reflecting the country lifestyle and its sporting traditions. Fly fishing in a river. fly fishing is a distinct and ancient angling method which uses flies that are cast with a special fishing rod and line..