invasion
noun
in·va·sion
in-ˈvā-zhən 
1
: an act of invading
especially
: incursion of an army for conquest or plunder
2
: the incoming or spread of something usually hurtful
Examples of invasion in a Sentence
The enemy launched an invasion.
The people live under a constant threat of invasion.
The town is gearing up for the annual tourist invasion.
protecting the house from insect invasion
Recent Examples on the Web
What is your outlook for the future of Ukrainian museums amid Russia’s ongoing invasion?
—
George Nelson, ARTnews.com, 15 July 2024
Today the membership has grown to 32, with the accession of Sweden on March 7, which followed Russia’s invasion of Ukraine.
—New York Daily News Editorial Board, New York Daily News, 14 July 2024
In May 2008, 57-year-old Sharon Causse was fatally shot in what appeared to be a home invasion after returning from a date night with her husband Thomas Randolph.
—Nicole Acosta, Peoplemag, 13 July 2024
Biden responded with disbelief that a lawmaker would challenge him on his national security credentials given his many years of experience and work on Russia’s invasion of Ukraine, one of the people said.
—Abbie Cheeseman, Washington Post, 13 July 2024
See all Example Sentences for invasion 
George Nelson, ARTnews.com, 15 July 2024
Today the membership has grown to 32, with the accession of Sweden on March 7, which followed Russia’s invasion of Ukraine.
—New York Daily News Editorial Board, New York Daily News, 14 July 2024
In May 2008, 57-year-old Sharon Causse was fatally shot in what appeared to be a home invasion after returning from a date night with her husband Thomas Randolph.
—Nicole Acosta, Peoplemag, 13 July 2024
Biden responded with disbelief that a lawmaker would challenge him on his national security credentials given his many years of experience and work on Russia’s invasion of Ukraine, one of the people said.
—Abbie Cheeseman, Washington Post, 13 July 2024
See all Example Sentences for invasion
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'invasion.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near invasion
Cite this Entry
“Invasion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invasion. Accessed 26 Jul. 2024.
Copy CitationKids Definition
invasion
noun
in·va·sion
in-ˈvā-zhən
: an act of invading
especially
: entrance of an army into a country for conquest
Medical Definition
invasion
noun
in·va·sion
in-ˈvā-zhən
: the act of invading: as
a
: the penetration of the body of a host by a microorganism
b
: the spread and multiplication of a pathogenic microorganism or of malignant cells in the body of a host
Legal Definition
invasion
noun
in·va·sion
in-ˈvā-zhən
: the act of or an instance of invading
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