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 use of the renminbi in trade settlements surged to record highs after Western nations imposed sanctions on Russia over the invasion of Ukraine, as China remained one of Russia’s top trading partners.
—
Stephanie Yang, CNN Money, 4 Feb. 2026
Following Vladimir Putin’s full invasion of Ukraine in 2022, FIFA co-ordinated with European football’s governing body UEFA to ban Russian teams from both club and international competitions.
—Adam Crafton, New York Times, 3 Feb. 2026
The decision to oust both nations from the Olympics follows Russia’s invasion of Ukraine in late February 2022, just days after the end of the Beijing Games, which featured the then-Russian Olympic Committee.
—Rebecca Cohen, NBC news, 3 Feb. 2026
Rodriguez was arrested during a SWAT raid on that apartment on December 19, roughly one month after the home invasion occurred.
—Preezy Brown, VIBE.com, 3 Feb. 2026
See All Example Sentences for invasion
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Stephanie Yang, CNN Money, 4 Feb. 2026
Following Vladimir Putin’s full invasion of Ukraine in 2022, FIFA co-ordinated with European football’s governing body UEFA to ban Russian teams from both club and international competitions.
—Adam Crafton, New York Times, 3 Feb. 2026
The decision to oust both nations from the Olympics follows Russia’s invasion of Ukraine in late February 2022, just days after the end of the Beijing Games, which featured the then-Russian Olympic Committee.
—Rebecca Cohen, NBC news, 3 Feb. 2026
Rodriguez was arrested during a SWAT raid on that apartment on December 19, roughly one month after the home invasion occurred.
—Preezy Brown, VIBE.com, 3 Feb. 2026
See All Example Sentences for invasion
Cite this Entry
“Invasion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invasion. Accessed 5 Feb. 2026.
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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