expansion

noun

ex·​pan·​sion ik-ˈspan(t)-shən How to pronounce expansion (audio)
1
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
expansional adjective

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 According to Reuters, Samsung’s subsidy will be announced next week, at which point the company will reveal a vast expansion of its Texas manufacturing investment to $44 billion. David Meyer, Fortune, 9 Apr. 2024 In better transit news, tunneling is complete for the Metro D Line expansion from Koreatown to the Westside, Caroline Petrow-Cohen reports. Sammy Roth, Los Angeles Times, 9 Apr. 2024 Since 2019, the emissions growth would have been three times larger without the expansion of five key clean energy technologies, including electric cars, wind, solar PV, nuclear and heat pumps. Daniel Peck, ABC News, 8 Apr. 2024 Key to this expansion is the company’s unwavering commitment to transparency and cost savings for clients. Kyle Russell, USA TODAY, 8 Apr. 2024 Since the start of the Biden administration, the state has welcomed more than $10 billion in federal investment in various solar, battery, electric vehicle and grid expansion projects, adding 14,000 jobs. The Arizona Republic, 7 Apr. 2024 Meanwhile, ownership groups in Nashville, Charlotte, Salt Lake City, Portland and now Sacramento have vocalized their support, while Nashville has already secured land for a ballpark and is seen as the most likely city to get an expansion team. Jason Mastrodonato, The Mercury News, 6 Apr. 2024 The Coastal Commission is expected to approve the expansion at a meeting Wednesday in Long Beach. Phil Diehl, San Diego Union-Tribune, 6 Apr. 2024 Some have worried that as the booming labor market recovery gave way to a milder expansion, job growth would mostly narrow to less cyclical sectors like government hiring and health care. Talmon Joseph Smith, New York Times, 5 Apr. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'expansion.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1611, in the meaning defined at sense 1

Time Traveler
The first known use of expansion was in 1611

Dictionary Entries Near expansion

Cite this Entry

“Expansion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/expansion. Accessed 21 Apr. 2024.

Kids Definition

expansion

noun
ex·​pan·​sion ik-ˈspan-chən How to pronounce expansion (audio)
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 How to pronounce expansion (audio)
1
: the act or process of expanding
2
: the quality or state of being expanded

More from Merriam-Webster on expansion

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