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
The funds will be used to bankroll the expansion of the flagship FPSO business as well as a growing green energy portfolio under Yinson Renewables, a subsidiary that has solar and wind power projects in multiple countries.
—
Jonathan Burgos, Forbes.com, 17 Apr. 2025
This also includes the expansion of the company’s Solomeo headquarters, already partly operational in 2025, and the production capacity for the 10-year project running from 2024 to 2033.
—Sofia Celeste, Footwear News, 16 Apr. 2025
Then, after the Biden administration granted TPS for Venezuelans, Rubio requested an expansion so more Venezuelans would qualify.
—Verónica Egui Brito, Miami Herald, 16 Apr. 2025
The expansion comes after Party City filed for bankruptcy last year and closed its 700 US stores in late February.
—Jordan Valinsky, CNN Money, 16 Apr. 2025
See All Example Sentences for expansion
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Jonathan Burgos, Forbes.com, 17 Apr. 2025
This also includes the expansion of the company’s Solomeo headquarters, already partly operational in 2025, and the production capacity for the 10-year project running from 2024 to 2033.
—Sofia Celeste, Footwear News, 16 Apr. 2025
Then, after the Biden administration granted TPS for Venezuelans, Rubio requested an expansion so more Venezuelans would qualify.
—Verónica Egui Brito, Miami Herald, 16 Apr. 2025
The expansion comes after Party City filed for bankruptcy last year and closed its 700 US stores in late February.
—Jordan Valinsky, CNN Money, 16 Apr. 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 22 Apr. 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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