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 words and actions that led to May 4th
Anti-war protests on college campuses intensified after April 30, 1970, when President Richard Nixon announced the U.S. invasion of Cambodia — a marked escalation of a war that many hoped was winding down.
—
Rachel Treisman, NPR, 4 May 2024
Boeing had been getting them from a supplier in Russia, but when that country launched a full-scale invasion of Ukraine and trade restrictions were put in place against Russian goods, Boeing started getting them from British and American suppliers.
—Melvin Backman, Quartz, 3 May 2024
See all Example Sentences for invasion 
Rachel Treisman, NPR, 4 May 2024
Boeing had been getting them from a supplier in Russia, but when that country launched a full-scale invasion of Ukraine and trade restrictions were put in place against Russian goods, Boeing started getting them from British and American suppliers.
—Melvin Backman, Quartz, 3 May 2024
See all Example Sentences for invasion
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'invasion.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near invasion
Cite this Entry
“Invasion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invasion. Accessed 9 May. 2024.
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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