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
Many Armenians feared an invasion to forcibly cut out a corridor.
—
Brady Knox, The Washington Examiner, 21 Sep. 2025
While the family debates on what is the most culturally appropriate mourning ritual, Russia begins its full-scale invasion of Ukraine, turning their lives upside down.
—Rafa Sales Ross, Variety, 20 Sep. 2025
Crawford was charged with eight counts of invasion of privacy and booked into the East County Jail.
—Madison E. Goldberg, PEOPLE, 20 Sep. 2025
Russia’s oil is discounted because of a price cap implemented in response to its invasion of Ukraine, making its oil 15 percent less than the price of oil on the market.
—Laura Kelly, The Hill, 20 Sep. 2025
See All Example Sentences for invasion
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Brady Knox, The Washington Examiner, 21 Sep. 2025
While the family debates on what is the most culturally appropriate mourning ritual, Russia begins its full-scale invasion of Ukraine, turning their lives upside down.
—Rafa Sales Ross, Variety, 20 Sep. 2025
Crawford was charged with eight counts of invasion of privacy and booked into the East County Jail.
—Madison E. Goldberg, PEOPLE, 20 Sep. 2025
Russia’s oil is discounted because of a price cap implemented in response to its invasion of Ukraine, making its oil 15 percent less than the price of oil on the market.
—Laura Kelly, The Hill, 20 Sep. 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 Sep. 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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