Man is born unto trouble, as the sparks fly upward. Job v. 7.

Fly, envious Time, till thou run out thy race. Milton.

The dark waves murmured as the ships flew on. Bryant.

Fly, ere evil intercept thy flight. Milton.

Whither shall I fly to escape their hands ? Shak.

To fly about (Naut.), to change frequently in a short time; -- said of the wind. -- To fly around, to move about in haste. [Colloq.] -- To fly at, to spring toward; to rush on; to attack suddenly. -- To fly in the face of, to insult; to assail; to set at defiance; to oppose with violence; to act in direct opposition to; to resist. -- To fly off, to separate, or become detached suddenly; to revolt. -- To fly on, to attack. -- To fly open, to open suddenly, or with violence. -- To fly out. (a) To rush out. (b) To burst into a passion; to break out into license. -- To let fly. (a) To throw or drive with violence; to discharge. "A man lets fly his arrow without taking any aim." Addison. (b) (Naut.) To let go suddenly and entirely; as, to let fly the sheets.

The brave black flag I fly. W. S. Gilbert.

Sleep flies the wretch. Dryden.

To fly the favors of so good a king. Shak.

To fly a kite (Com.), to raise money on commercial notes. [Cant or Slang]

A trifling fly, none of your great familiars. B. Jonson.

Black fly, Cheese fly, Dragon fly, etc. See under Black, Cheese, etc. -- Fly agaric (Bot.), a mushroom (Agaricus muscarius), having a narcotic juice which, in sufficient quantities, is poisonous. -- Fly block (Naut.), a pulley whose position shifts to suit the working of the tackle with which it is connected; -- used in the hoisting tackle of yards. -- Fly board (Printing Press), the board on which printed sheets are deposited by the fly. -- Fly book, a case in the form of a book for anglers' flies. Kingsley. -- Fly cap, a cap with wings, formerly worn by women. -- Fly drill, a drill having a reciprocating motion controlled by a fly wheel, the driving power being applied by the hand through a cord winding in reverse directions upon the spindle as it rotates backward and forward. Knight. -- Fly fishing, the act or art of angling with a bait of natural or artificial flies. Walton. -- Fly flap, an implement for killing flies. -- Fly governor, a governor for regulating the speed of an engine, etc., by the resistance of vanes revolving in the air. -- Fly honeysuckle (Bot.), a plant of the honeysuckle genus (Lonicera), having a bushy stem and the flowers in pairs, as L. ciliata and L. Xylosteum. -- Fly hook, a fishhook supplied with an artificial fly. -- Fly leaf, an unprinted leaf at the beginning or end of a book, circular, programme, etc. -- Fly maggot, a maggot bred from the egg of a fly. Ray. -- Fly net, a screen to exclude insects. -- Fly nut (Mach.), a nut with wings; a thumb nut; a finger nut. -- Fly orchis (Bot.), a plant (Ophrys muscifera), whose flowers resemble flies. - - Fly paper, poisoned or sticky paper for killing flies that feed upon or are entangled by it. -- Fly powder, an arsenical powder used to poison flies. -- Fly press, a screw press for punching, embossing, etc., operated by hand and having a heavy fly. -- Fly rail, a bracket which turns out to support the hinged leaf of a table. -- Fly rod, a light fishing rod used in angling with a fly. -- Fly sheet, a small loose advertising sheet; a handbill. -- Fly snapper (Zoöl.), an American bird (Phainopepla nitens), allied to the chatterers and shrikes. The male is glossy blue-black; the female brownish gray. -- Fly wheel (Mach.), a heavy wheel attached to machinery to equalize the movement (opposing any sudden acceleration by its inertia and any retardation by its momentum), and to accumulate or give out energy for a variable or intermitting resistance. See Fly, n., 9. -- On the fly (Baseball), still in the air; -- said of a batted ball caught before touching the ground..