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
But since Hamas' October 7 attack and Israel's retaliatory invasion of Gaza, a new player in that conflict threatens not just digital infrastructure in Israel but also critical systems in the US and around the world.
—
Andy Greenberg, Wired News, 14 Apr. 2025
With autonomous, always-active agents, the risk of privacy invasion becomes even greater.
—Bernard Marr, Forbes.com, 14 Apr. 2025
Svitolina, the world No. 18 and one of the most prominent sporting campaigners against Russia’s invasion of Ukraine since 2022, sealed the finals berth with a 6-4, 6-2 win over Swiss world No. 96 Jil Teichmann.
—James Hansen, New York Times, 13 Apr. 2025
Powered by As for the extraordinary claims of a Soviet-era alien invasion and retaliatory attack, Baker does not buy it.
—Julia Bonavita, FOXNews.com, 13 Apr. 2025
See All Example Sentences for invasion
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Andy Greenberg, Wired News, 14 Apr. 2025
With autonomous, always-active agents, the risk of privacy invasion becomes even greater.
—Bernard Marr, Forbes.com, 14 Apr. 2025
Svitolina, the world No. 18 and one of the most prominent sporting campaigners against Russia’s invasion of Ukraine since 2022, sealed the finals berth with a 6-4, 6-2 win over Swiss world No. 96 Jil Teichmann.
—James Hansen, New York Times, 13 Apr. 2025
Powered by As for the extraordinary claims of a Soviet-era alien invasion and retaliatory attack, Baker does not buy it.
—Julia Bonavita, FOXNews.com, 13 Apr. 2025
See All Example Sentences for invasion
Cite this Entry
“Invasion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invasion. Accessed 22 Apr. 2025.
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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