expansion
noun
ex·pan·sion
ik-ˈspan(t)-shən 
1
: expanse
2
: the act or process of expanding
territorial expansion
economic expansion
expansion of the universe
3
: the quality or state of being expanded
4
: the increase in volume of working fluid (such as steam) in an engine cylinder after cutoff or in an internal combustion engine after explosion
5
a
: an expanded part
b
: something that results from an act of expanding
the book is an expansion of a lecture series
6
: the result of carrying out an indicated mathematical operation : the expression of a function in the form of a series
Synonyms
Examples of expansion in a Sentence
The league is undergoing expansion.
the expansion of a lecture series into a book
This book is an expansion of a lecture series.
Recent Examples on the Web
International expansion has also required new packaging.
—
David Thomas Tao, Forbes, 10 Jan. 2025
Often associated with the age of industrial expansion in Britain, the Victorian style can be seen as a reaction to the symmetrical and straightforward designs of Neoclassical and Georgian styles.
—Lauren Gallow, Architectural Digest, 10 Jan. 2025
With Klick out of the Legislature after losing her March primary, another member will have to take the helm on medical marijuana expansion for proposals to pass this time around.
—Eleanor Dearman, Fort Worth Star-Telegram, 10 Jan. 2025
The combination of low humidity, dry fuels, and shifting winds has heightened the potential for spot fires and rapid expansion.
—Anna Skinner, Newsweek, 10 Jan. 2025
See all Example Sentences for expansion 
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David Thomas Tao, Forbes, 10 Jan. 2025
Often associated with the age of industrial expansion in Britain, the Victorian style can be seen as a reaction to the symmetrical and straightforward designs of Neoclassical and Georgian styles.
—Lauren Gallow, Architectural Digest, 10 Jan. 2025
With Klick out of the Legislature after losing her March primary, another member will have to take the helm on medical marijuana expansion for proposals to pass this time around.
—Eleanor Dearman, Fort Worth Star-Telegram, 10 Jan. 2025
The combination of low humidity, dry fuels, and shifting winds has heightened the potential for spot fires and rapid expansion.
—Anna Skinner, Newsweek, 10 Jan. 2025
See all Example Sentences for expansion
Dictionary Entries Near expansion
Cite this Entry
“Expansion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/expansion. Accessed 18 Jan. 2025.
Copy CitationKids Definition
expansion
noun
ex·pan·sion
ik-ˈspan-chən
1
: the act of expanding
2
: the state of being expanded
3
: something expanded or a result of expanding
4
: the result of carrying out indicated mathematical operations
the expansion of (a + b)2 is a2 + 2ab + b2
Medical Definition
expansion
noun
ex·pan·sion
ik-ˈspan-chən
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