Definition of expansion
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
5a : an expanded partb : 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
expansionalplay \ik-ˈspanch-nəl, -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.
Recent Examples of expansion from the Web
Arizona has seen more than 400,000 people get insurance, plus another 20,000 children under a plan known as KidsCare, under Medicaid expansion.
Morgan has worked on health care reform and Medicaid expansion while holding positions in state government.
The investments in Alabama are part of a $6.8 billion capital program nationwide, which includes the expansion and remodeling of stores, clubs and distribution centers.
Six-year-old Ernie, a Masai giraffe, was brought to Lehigh Valley Zoo from the Kansas City Zoo in Missouri last week along with his 16-year-old father, Murphy, as part of a $3.8 million expansion of the Schnecksville zoo’s African animals exhibit.
The expansion of the casino and construction of its hotel led to the previous concert series being discontinued.
In Alabama, Daimler produces more SUVs than anywhere else in the world and is in the midst of a $1.3 billion expansion.
Here’s how George W. Bush expressed that same thought after NATO expansion in 2002.
Bank debt, as with most Trump family deals, has played a part in the expansion of the golf business.
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.
First Known Use of expansion
EXPANSION Defined for English Language Learners
Definition of expansion for English Language Learners
: 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 Defined for Kids
Seen and Heard
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