verb, flew or, for 11, 19, flied, flown, fly⋅ing, noun, plural flies.| 1. | to move through the air using wings. |
| 2. | to be carried through the air by the wind or any other force or agency: bits of paper flying about. |
| 3. | to float or flutter in the air: flags flying in the breeze. |
| 4. | to travel in an aircraft or spacecraft. |
| 5. | to move suddenly and quickly; start unexpectedly: He flew from the room. |
| 6. | to change rapidly and unexpectedly from one state or position to another: The door flew open. |
| 7. | to flee; escape. |
| 8. | to travel in space: The probe will fly past the planet. |
| 9. | to move or pass swiftly: How time flies! |
| 10. | to move with an aggressive surge: A mother fox will fly at anyone approaching her kits. |
| 11. | Baseball.
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| 12. | Informal. to be acceptable, believable, or feasible: It seemed like a good idea, but it just wouldn't fly. |
| 13. | to make (something) float or move through the air: to fly a kite. |
| 14. | to operate (an aircraft, spacecraft, or the like). |
| 15. | to hoist aloft, as for display, signaling, etc.: to fly a flag. |
| 16. | to operate an aircraft or spacecraft over: to fly the Pacific. |
| 17. | to transport or convey by air: We fly merchandise to Boston. |
| 18. | to escape from; flee: to fly someone's wrath. |
| 19. | Theater.
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| 20. | a strip of material sewn along one edge of a garment opening for concealing buttons, zippers, or other fasteners. |
| 21. | a flap forming the door of a tent. |
| 22. | Also called tent fly. a piece of canvas extending over the ridgepole of a tent and forming an outer roof. |
| 23. | an act of flying; a flight. |
| 24. | the course of a flying object, as a ball. |
| 25. | Baseball. fly ball. |
| 26. | British. a light, covered, public carriage drawn by one horse; hansom; hackney coach. |
| 27. | Machinery. a horizontal arm, weighted at each end, that pivots about the screw of a press so that when the screw is lowered the momentum of the fly will increase the force of the press. |
| 28. | Also called fan. Horology. a regulating device for chime and striking mechanisms, consisting of an arrangement of vanes on a revolving axis. |
| 29. | Printing.
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| 30. | (on a flag)
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| 31. | flies. Also called fly loft. Theater. the space above the stage used chiefly for storing scenery and equipment. |
| 32. | Nautical. a propellerlike device streamed to rotate and transfer information on speed to a mechanical log. |
| 33. | fly out, Baseball, Softball. to be put out by hitting a fly ball that is caught by a player of the opposing team. |
| 34. | fly blind. blind (def. 33). |
| 35. | fly in the face of, to act in defiance of (authority, custom, etc.). Also, fly in the teeth of. |
| 36. | fly off the handle. handle (def. 16). |
| 37. | go fly a kite, Slang.
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| 38. | let fly,
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| 39. | on the fly,
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| 1. | Also called true fly. any of numerous two-winged insects of the order Diptera, esp. of the family Muscidae, as the common housefly. |
| 2. | any of various winged insects, as the mayfly or firefly. |
| 3. | Angling. a fishhook dressed with hair, feathers, silk, tinsel, etc., so as to resemble an insect or small fish, for use as a lure or bait. |
| 4. | (initial capital letter ) Astronomy. the constellation Musca. |
| 5. | fly in the ointment, a detrimental factor; detraction: If there's one fly in the ointment, it's that there may not be the money to finish the job. |

| a ball that is batted up into the air. |
fly
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fly (flī)
n.
Any of numerous two-winged insects of the order Diptera.
Fly
Heb. zebub, (Eccl. 10:1; Isa. 7:18). This fly was so grievous a pest that the Phoenicians invoked against it the aid of their god Baal-zebub (q.v.). The prophet Isaiah (7:18) alludes to some poisonous fly which was believed to be found on the confines of Egypt, and which would be called by the Lord. Poisonous flies exist in many parts of Africa, for instance, the different kinds of tsetse. Heb. 'arob, the name given to the insects sent as a plague on the land of Egypt (Ex. 8:21-31; Ps. 78:45; 105:31). The LXX. render this by a word which means the "dog-fly," the cynomuia. The Jewish commentators regarded the Hebrew word here as connected with the word _'arab_, which means "mingled;" and they accordingly supposed the plague to consist of a mixed multitude of animals, beasts, reptiles, and insects. But there is no doubt that "the _'arab_" denotes a single definite species. Some interpreters regard it as the Blatta orientalis, the cockroach, a species of beetle. These insects "inflict very painful bites with their jaws; gnaw and destroy clothes, household furniture, leather, and articles of every kind, and either consume or render unavailable all eatables."