CLEARANCE • DICTIONARY ONE.COM • Definition of Clearance

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/klˈɪrəns/ Listen

noun

Clearance n.

The act of clearing; as, to make a thorough clearance.

A certificate that a ship or vessel has been cleared at the customhouse; permission to sail. "Every ship was subject to seizure for want of stamped clearances."

Clear or net profit.

(Mach.) The distance by which one object clears another, as the distance between the piston and cylinder head at the end of a stroke in a steam engine, or the least distance between the point of a cogwheel tooth and the bottom of a space between teeth of a wheel with which it engages.

Clearance space (Steam engine), the space inclosed in one end of the cylinder, between the valve or valves and the piston, at the beginning of a stroke; waste room. It includes the space caused by the piston's clearance and the space in ports, passageways, etc. Its volume is often expressed as a certain proportion of the volume swept by the piston in a single stroke.

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Etymology of 'Clearance'

Collaborative International Dictionary of English 0.48

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"Clearance" Quotes from Famous Books

... Frederick, but the Prussians have recovered it to-day by exercising common sense. However our veterans of the Empire had preserved this idea, which comes from instinct. They enlarged their vents, scornful of flare backs, to avoid having to open the chamber and prime. The bullet having a good deal of clearance when the cartridge was torn and put in the gun, with a blow of the butt on the ground they had their arms ...

— Battle Studies • Colonel Charles-Jean-Jacques-Joseph Ardant du Picq

... does not care why the moving buckets are made of a certain curvature, but he does care about the distance between the moving bucket and the stationary one, and he wants to know how to measure that distance, how to alter the clearance, if necessary, to prevent rubbing. He doesn't care anything about the area of the step-bearing, but he does want to know the way to get at the bearing to take it down and put ...

— Steam Turbines - A Book of Instruction for the Adjustment and Operation of - the Principal Types of this Class of Prime Movers • Hubert E. Collins

... victims. I may add, that I saw a good deal of the neighbourhood at this time in the company of my cousin, and gleaned, from my visits to shieling and cottage, most of my conceptions of the state of the Northern Highlands, ere the clearance system had depopulated the interior of the country, and precipitated its poverty-stricken ...

— My Schools and Schoolmasters - or The Story of my Education. • Hugh Miller

... prevent this, to clear the scrub for as great a range as possible from the ends of the position, everywhere below the ground-level, and also on the level ground, except for a good fringe just on the edges of the banks. This fringe I thought would be sufficient to hide the clearance to any one not very close. I now blessed the man who had left us some cutting tools. Whilst all this was being carried out, I paced out some ranges to the north and south, and these we marked by a few empty tins ...

— The Defence of Duffer's Drift • Ernest Dunlop Swinton

... on the face of the wall was 2 in. per ft., and a bridge seat 3-1/2 ft. wide was formed at an elevation of 22 ft., minimum clearance, above the top of the rail. This bridge seat was made level. The maximum height of the south wall is 49 ft., and of ...

— Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 • B.F. Cresson, Jr

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