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
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
But recent court filings suggest the company’s expansion may have been accompanied by financial hardship.
—
David Hudnall, Kansas City Star, 12 Mar. 2025
The federal government pays 90% of the costs of Idaho’s Medicaid expansion.
—Sarah Cutler and, Idaho Statesman, 12 Mar. 2025
The game’s success has lead to multiple expansions and placement on retail shelves next to board game classics like Monopoly and Clue.
—Rob Wieland, Forbes, 12 Mar. 2025
For those unfamiliar with Pokémon cards, an Elite Trainer Box is a special collector's box containing a variety of cards, packs, and accessories designed for fans looking to enhance their collection or dive into a new expansion.
—Faisal Kutty, Newsweek, 12 Mar. 2025
See All Example Sentences for expansion
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David Hudnall, Kansas City Star, 12 Mar. 2025
The federal government pays 90% of the costs of Idaho’s Medicaid expansion.
—Sarah Cutler and, Idaho Statesman, 12 Mar. 2025
The game’s success has lead to multiple expansions and placement on retail shelves next to board game classics like Monopoly and Clue.
—Rob Wieland, Forbes, 12 Mar. 2025
For those unfamiliar with Pokémon cards, an Elite Trainer Box is a special collector's box containing a variety of cards, packs, and accessories designed for fans looking to enhance their collection or dive into a new expansion.
—Faisal Kutty, Newsweek, 12 Mar. 2025
See All Example Sentences for expansion
Cite this Entry
“Expansion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/expansion. Accessed 16 Mar. 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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