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expansion

[ ik-span-shuhn ]
/ ɪkˈspæn ʃən /
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noun

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Origin of expansion

1605–15; <Late Latin expānsiōn- (stem of expānsiō) a spreading out. See expanse, -ion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for expansion

expansion
/ (ɪkˈspænʃən) /

noun

expansionary, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for expansion

expansion
[ ĭk-spănshən ]

n.

An increase in size.
The spreading out of a structure, such as a tendon.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for expansion

expansion
[ ĭk-spănshən ]

An increase in the volume of a substance while its mass remains the same. Expansion is usually due to heating. When substances are heated, the molecular bonds between their particles are weakened, and the particles move faster, causing the substance to expand.
A number or other mathematical expression written in an extended form. For example, a2 + 2ab + b2 is the expansion of (a + b)2.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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