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expansion
[ ik-span-shuhn ]
/ ɪkˈspæn ʃən /
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noun
QUIZ
THINGAMABOB OR THINGUMMY: CAN YOU DISTINGUISH BETWEEN THE US AND UK TERMS IN THIS QUIZ?
Do you know the difference between everyday US and UK terminology? Test yourself with this quiz on words that differ across the Atlantic.
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In the UK, COTTON CANDY is more commonly known as…
Origin of expansion
OTHER WORDS FROM expansion
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Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use expansion in a sentence
British Dictionary definitions for expansion
expansion
/ (ɪkˈspænʃən) /
noun
Derived forms of expansion
expansionary, adjectiveCollins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for expansion
expansion
[ ĭk-spăn′shən ]
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
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