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
Vernengo said the reclassification of drug dealers as terrorists has led many in the region to assume that there is a push for a possible invasion of Venezuela, whose neighbors have no choice but to have a relationship with the United States.
—
Brendan Cole, MSNBC Newsweek, 25 Oct. 2025
First, and perhaps most obvious, the fictional thriller draws inspiration from the Manson Family's home invasion and murder of Sharon Tate and her friends, Jay Sebring, Abigail Folger and Wojciech Frykowski, as well as Steven Parent, who was visiting the home's caretaker.
—Stephanie Sengwe, PEOPLE, 25 Oct. 2025
North Korea has sent soldiers, artillery ammunition and missiles to Russia to support Moscow’s full-scale invasion of Ukraine.
—Reuters, NBC news, 24 Oct. 2025
After Moscow’s all-out invasion of Ukraine in February 2022, EU countries moved to slash Russian energy imports to cut off a major source of the Kremlin’s revenue.
—Christian Edwards, CNN Money, 24 Oct. 2025
See All Example Sentences for invasion
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Brendan Cole, MSNBC Newsweek, 25 Oct. 2025
First, and perhaps most obvious, the fictional thriller draws inspiration from the Manson Family's home invasion and murder of Sharon Tate and her friends, Jay Sebring, Abigail Folger and Wojciech Frykowski, as well as Steven Parent, who was visiting the home's caretaker.
—Stephanie Sengwe, PEOPLE, 25 Oct. 2025
North Korea has sent soldiers, artillery ammunition and missiles to Russia to support Moscow’s full-scale invasion of Ukraine.
—Reuters, NBC news, 24 Oct. 2025
After Moscow’s all-out invasion of Ukraine in February 2022, EU countries moved to slash Russian energy imports to cut off a major source of the Kremlin’s revenue.
—Christian Edwards, CNN Money, 24 Oct. 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 29 Oct. 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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