expansion

noun
ex·​pan·​sion | \ ik-ˈspan(t)-shən How to pronounce expansion (audio) \

Definition of expansion

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
5a : 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

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Other Words from expansion

expansional \ ik-​ˈspanch-​nəl How to pronounce expansional (audio) , -​ˈspan(t)-​shə-​nᵊl \ 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.
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Recent Examples on the Web Employers slashed their work forces, consumers cut spending and corporations pulled back on investment and expansion. Christopher Rugaber, Anchorage Daily News, "US recorded fewer job gains in July amid signs coronavirus resurgence is hurting economic rebound," 7 Aug. 2020 Employers slashed their work forces, consumers cut spending and corporations pulled back on investment and expansion. Christopher Rugaber, Star Tribune, "US adds 1.8 million jobs in a sign that hiring has weakened," 7 Aug. 2020 Employers slashed their work forces, consumers cut spending and corporations pulled back on investment and expansion. Arkansas Online, "U.S. adds 1.8 million jobs in a sign that hiring has weakened," 7 Aug. 2020 Furthermore, a large hollow cavity in the bullet nose, along with exterior jacket skiving, further aids expansion and penetration. Field & Stream, "Best of Both Worlds," 3 Aug. 2020 Stewart is on the board of directors and advisory committee of the Music City Baseball group trying to acquire a team, either through expansion or relocation, in Nashville, Tenn. Bob Nightengale, USA TODAY, "The Nashville Stars could be MLB's next team – and baseball's first Black-owned club," 8 July 2020 While for many, physical distancing has impeded access to resources, some service providers credit an expansion of telehealth – and insurance coverage of it – as lowering barriers to treatment during the pandemic. Sarah Matusek, The Christian Science Monitor, "Addiction, hope, and recovery in the time of COVID-19," 8 July 2020 In the Washington region, the decline in toll revenue is hurting operations and expansion in some areas. Washington Post, "People are driving less and skipping the toll roads, leaving less money for local projects," 4 July 2020 An index score above 50 indicates optimism and expansion, while one below 50 indicates pessimism and a contraction. Aldo Svaldi, The Denver Post, "Worst of economic downturn in rear-view mirror, Colorado business leaders report," 1 July 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'expansion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of expansion

1611, in the meaning defined at sense 1

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Time Traveler for expansion

Time Traveler

The first known use of expansion was in 1611

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Statistics for expansion

Last Updated

11 Aug 2020

Cite this Entry

“Expansion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/expansion. Accessed 14 Aug. 2020.

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More Definitions for expansion

expansion

noun
How to pronounce expansion (audio)

English Language Learners Definition of expansion

: the act of becoming bigger or of making something bigger : the act of expanding
: a more complete and detailed written work or set of comments based on something shorter

expansion

noun
ex·​pan·​sion | \ ik-ˈspan-shən How to pronounce expansion (audio) \

Kids Definition of expansion

: the act of growing or increasing : enlargement

expansion

noun
ex·​pan·​sion | \ ik-ˈspan-chən How to pronounce expansion (audio) \

Medical Definition of expansion

1 : the act or process of expanding
2 : the quality or state of being expanded

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Comments on expansion

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