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
Indeed, war games conducted by the US Air Force and defense think tanks like Rand over the past several years have pointed to the critical role drone swarms could play in potentially thwarting an invasion of Taiwan.
—
Jared Keller, WIRED, 19 Aug. 2024
Modi has repeatedly called for a ceasefire in Ukraine, without condemning Russia’s aerial campaign or denouncing the ground invasion.
—Aishwarya S Iyer, CNN, 19 Aug. 2024
Whether the high losses are worth it to the general staff in Kyiv depends on the invasion’s objectives—and whether the loss ratio flips as the Kursk campaign develops.
—David Axe, Forbes, 17 Aug. 2024
Seal the border and stop the migrant invasion Carry out the largest deportation operation in American history
End inflation, and make America affordable again
Make America the dominant energy producer in the world, by far!
—Kinsey Crowley, USA TODAY, 17 Aug. 2024
See all Example Sentences for invasion 
Jared Keller, WIRED, 19 Aug. 2024
Modi has repeatedly called for a ceasefire in Ukraine, without condemning Russia’s aerial campaign or denouncing the ground invasion.
—Aishwarya S Iyer, CNN, 19 Aug. 2024
Whether the high losses are worth it to the general staff in Kyiv depends on the invasion’s objectives—and whether the loss ratio flips as the Kursk campaign develops.
—David Axe, Forbes, 17 Aug. 2024
Seal the border and stop the migrant invasion Carry out the largest deportation operation in American history
End inflation, and make America affordable again
Make America the dominant energy producer in the world, by far!
—Kinsey Crowley, USA TODAY, 17 Aug. 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 12 Sep. 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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