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more about clearance
clearance |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Clearance \Clear"ance\ (-ans), n. 1. The act of clearing; as to make a thorough clearance. 2. 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. --Durke 3. Clear or net profit. --Trollope. 4. (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. From WordNet r 1.6 [wn]: clearance n 1: the distance by which one thing clears another; the space between them 2: vertical space available to allow easy passage under something [syn: {headroom}, {headway}] 3: permission to proceed; "the plane was given clearance to land"
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