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oat (Naut.), a piece of canvas nailed around a mast, where it passes through the deck, to prevent water from getting below. -- Sail coat (Naut.), a canvas cover laced over furled sails, and the like, to keep them dry and clean.

to its place, or for hibing an opening around an object; as, a collar on a shaft, used to prevent endwise motion of the shaft; a collar surrounding a stovepipe at the place where it enters a wall. The flanges of a piston and the gland of a stuffing box are sometimes called collars.

To hide or withdraw from observation; to cover; to cover or keep from sight; to prevent the discovery of; to withhold knowledge of. It is the glory of God to conceal a thing. Prov. xxv. 2. Declare ye among the nations, . . . publish and conceal not. Jer. 1. 2. He which finds him shall deserve our thanks, . . . He that…

nt to wrongdoing, not involving actual participation in, but knowledge of, and failure to prevent or oppose it.

To stop (a channel) by filling it, and preventing passage through it; as, to constipate the capillary vessels.

ate of being continued; uninterrupted extension or succession; prolongation; propagation. Preventing the continuation of the royal line. Macaulay.

Illegal or prohobited traffic. Persons the most bound in duty to prevent contraband, and the most interested in the seizures. Burke.

ilitary posts around a district infected with disease, to cut off communication, and thus prevent the disease from spreading.

d, as a sitting of the House, when it is ascertained that a quorum is not present. (c) To prevent the accession of (a person) to office, by a fraudulent return or count of the votes cast; -- said of a candidate really elected. [Colloq.]

over the grade. Knight. To cradle a picture, to put ribs across the back of a picture, to prevent the panels from warping.

short pieces of iron instead of rings; also, a fixture with iron points worn on a shoe to prevent one from slipping.

To saturate or impregnate with creosote, as timber, for the prevention of decay.

A framework of timbers and plank backing for a shaft lining, to prevent caving, percolation of water, etc.

at discourteously or unreasonably. [Colloq.] To crowd out, to press out; specifically, to prevent the publication of; as, the press of other matter crowded out the article. -- To crowd sail (Naut.), to carry an extraordinary amount of sail, with a view to accelerate the speed of a vessel; to carry a press of sail.…

A frame or wall round the mouth of a well; also, a frame within a well to prevent the earth caving in.

State of being guarded and watched to prevent escape; restraint of liberty; confinement; imprisonment. What pease will be given To us enslaved, but custody severe, And stripes and arbitrary punishment Milton.

A barrier to prevent the flow of a liquid; esp., a bank of earth, or wall of any kind, as of masonry or wood, built across a water course, to confine and keep back flowing water.

d, under Carbonic. -- Damp sheet, a curtain in a mine gallery to direct air currents and prevent accumulation of gas. -- Fire damp, a damp consisting chiefly of light carbureted hydrogen; -- so called from its tendence to explode when mixed with atmospheric air and brought into contact with flame.

pon a picture. I take care to dash the character with such particular circumstance as may prevent ill-natured applications. Addison. The very source and fount of day Is dashed with wandering isles of night. Tennyson.

tic or hydraulic cushion for a falling weight, as in the valve gear of a steam engine, to prevent shock.