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
The raids are meant to provide necessary intelligence for a possible wider ground invasion.
—
Mike Brest, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 30 Sep. 2024
The uplift was in part due to Russia’s invasion of Ukraine, but strong refinery margins and the rising dominance of U.S. oil and gas production kept margins elevated through 2023 for some companies.
—Jason Ma, Fortune, 30 Sep. 2024
Filmmaker and photographer Max Lowe documented his second trip to Healing Base Camp, a weeklong program for families whose lives were upended by the violence of Russia’s invasion of Ukraine.
—Kyra Kennedy, Outside Online, 29 Sep. 2024
The invasion was based on what turned out to be faulty claims that Saddam Hussein had secretly stashed weapons of mass destruction.
—Qassim Abdul-Zahra and Tara Copp, Los Angeles Times, 28 Sep. 2024
See all Example Sentences for invasion 
Mike Brest, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 30 Sep. 2024
The uplift was in part due to Russia’s invasion of Ukraine, but strong refinery margins and the rising dominance of U.S. oil and gas production kept margins elevated through 2023 for some companies.
—Jason Ma, Fortune, 30 Sep. 2024
Filmmaker and photographer Max Lowe documented his second trip to Healing Base Camp, a weeklong program for families whose lives were upended by the violence of Russia’s invasion of Ukraine.
—Kyra Kennedy, Outside Online, 29 Sep. 2024
The invasion was based on what turned out to be faulty claims that Saddam Hussein had secretly stashed weapons of mass destruction.
—Qassim Abdul-Zahra and Tara Copp, Los Angeles Times, 28 Sep. 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 4 Oct. 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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