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Expansion   /ɪkspˈænʃən/  /ɪkspˈæntʃən/   Listen
noun
Expansion  n.  
1.
The act of expanding or spreading out; the condition of being expanded; dilation; enlargement.
2.
That which is expanded; expanse; extend surface; as, the expansion of a sheet or of a lake; the expansion was formed of metal. "The starred expansion of the skies."
3.
Space through which anything is expanded; also, pure space. "Lost in expansion, void and infinite."
4.
(Economics & Commmerce) An increase in the production of goods and services over time, and in the volume of business transactions, generally associated with an increase in employment and an increase in the money supply. Opposite of contraction.
Synonyms: economic expansion.
5.
(Math.) The developed result of an indicated operation; as, the expansion of (a + b)^(2) is a^(2) + 2ab + b^(2).
6.
(Steam Engine) The operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston.
7.
(Nav. Arch.) The enlargement of the ship mathematically from a model or drawing to the full or building size, in the process of construction. Note: Expansion is also used adjectively, as in expansion joint, expansion gear, etc.
8.
An enlarged or extended version of something, such as a writing or discourse; as, the journal article is an expansion of the lecture she gave.
9.
An expansion joint. See below. (Colloq. or jargon)
Expansion curve, a curve the coördinates of which show the relation between the pressure and volume of expanding gas or vapor; esp. (Steam engine), that part of an indicator diagram which shows the declining pressure of the steam as it expands in the cylinder.
Expansion gear (Steam Engine). a cut-off gear.
Automatic expansion gear or Automatic cut-off, one that is regulated by the governor, and varies the supply of steam to the engine with the demand for power.
Fixed expansion gear, or Fixed cut-off, one that always operates at the same fixed point of the stroke.
Expansion joint, or Expansion coupling (Mech. & Engin.), a yielding joint or coupling for so uniting parts of a machine or structure that expansion, as by heat, is prevented from causing injurious strains; as:
(a)
A slide or set of rollers, at the end of bridge truss, to support it but allow end play.
(b)
A telescopic joint in a steam pipe, to permit one part of the pipe to slide within the other.
(c)
A clamp for holding a locomotive frame to the boiler while allowing lengthwise motion.
(d)
a strip of compressible material placed at intervals between blocks of poured concrete, as in roads or sidewalks.
Expansion valve (Steam Engine), a cut-off valve, to shut off steam from the cylinder before the end of each stroke.





Collaborative International Dictionary of English 0.48


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"Expansion" Quotes from Famous Books



... unmoved by the passion of Cuckoo's regret, nor entirely unaware that it was a passion in which he must have some share, whether now or at some more distant time, when the thrall of recently moved senses was weakened, and the numbness really born of excitement melted in the quiet expansion of a manly and a reasonable calm. His understanding of her passion, none too definite at first, gave him a moment's wonder, both at her and at himself. It seemed strange that the shattered influence of Valentine should be of less account to him who had known and loved it ...
— Flames • Robert Smythe Hichens
... mastered the House before, and he would do so now. Apart from his deadly antipathy to his half-brother, and the gain to himself—to his credit, the latter weighed with him not so much, so set was he on a stubborn course—if David disappeared for ever, there was at bottom a spirit of anti-expansion, of reaction against England's world- wide responsibilities. He had no largeness of heart or view concerning humanity. He had no inherent greatness, no breadth of policy. With less responsibility taken, there ...
— The Judgment House • Gilbert Parker
... relations with him had wholly terminated; obviously indeed a good while after; and it was natural enough that of his previous life she should have ascertained only what he had judged good to communicate. There were passages it was quite conceivable that even in moments of the tenderest expansion he should have withheld. Of many facts in the career of a man so in the eye of the world there was of course a common knowledge; but this lady lived apart from public affairs, and the only time perfectly clear to her would have been the time following the ...
— The Altar of the Dead • Henry James
... instincts. And when I think of Calvinism I see, not Dr. Pound, who preached it, but my father, who practised and embodied it. I loved him, but he made of righteousness a stern and terrible thing implying not joy, but punishment, the, suppression rather than the expansion of aspirations. His religion seemed woven all of austerity, contained no shining threads to catch my eye. Dreams, to him, were matters ...
— The Crossing • Winston Churchill
... have therefore found no such tales in the lower savagery; and even among the Lapplanders and the Siberian tribes the stories we have been able to collect speak only of short periods, such as the transition from autumn to spring, where a man had slept through the winter, and the expansion of a day into a month, or a year. In these two cases not only the phases of the moon and the measurement of time by them, which must have been early in development, but also the cycle of the seasons had been observed. But the idea lying at the root of this group of tales ...
— The Science of Fairy Tales - An Inquiry into Fairy Mythology • Edwin Sidney Hartland


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