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
Doyle also has two other convictions for narcotics possession, and in 2010 he was charged with armed home invasion and aggravated domestic battery stemming from an incident in Skokie.
—
Jason Meisner, Chicago Tribune, 9 July 2025
The country has been at war since Russia’s invasion in February 2022.
—Lily Templeton, Footwear News, 7 July 2025
The strain of keeping Russia's invasion at bay, and the lack of progress in direct peace talks, has compelled Ukraine to seek more military help from the United States and Europe.
—Shane Croucher, MSNBC Newsweek, 7 July 2025
That company sent 38 men to the D-Day invasion of Normandy Beach and accounted for more casualties of the pivotal World War II battle per capita than any other town in the United States.
—Phaedra Trethan, USA Today, 5 July 2025
See All Example Sentences for invasion
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Jason Meisner, Chicago Tribune, 9 July 2025
The country has been at war since Russia’s invasion in February 2022.
—Lily Templeton, Footwear News, 7 July 2025
The strain of keeping Russia's invasion at bay, and the lack of progress in direct peace talks, has compelled Ukraine to seek more military help from the United States and Europe.
—Shane Croucher, MSNBC Newsweek, 7 July 2025
That company sent 38 men to the D-Day invasion of Normandy Beach and accounted for more casualties of the pivotal World War II battle per capita than any other town in the United States.
—Phaedra Trethan, USA Today, 5 July 2025
See All Example Sentences for invasion
Cite this Entry
“Invasion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://x0upouf933.proxynodejs.usequeue.com/dictionary/invasion. Accessed 12 Jul. 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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