invasion
Americannoun
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an act or instance of invading or entering as an enemy, especially by an army.
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the entrance or advent of anything troublesome or harmful, as disease.
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entrance as if to take possession or overrun.
the annual invasion of the resort by tourists.
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infringement by intrusion.
noun
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the act of invading with armed forces
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any encroachment or intrusion
an invasion of rats
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the onset or advent of something harmful, esp of a disease
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pathol the spread of cancer from its point of origin into surrounding tissues
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the movement of plants to a new area or to an area to which they are not native
Other Word Forms
- preinvasion adjective
- reinvasion noun
Etymology
Origin of invasion
1400–50; late Middle English < Late Latin invāsīon- (stem of invāsiō ), equivalent to invās ( us ), past participle of invādere + -iōn- -ion; invade
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
At the same time, American production growth—a key shock absorber for high prices after Russia’s invasion of Ukraine—appears to be plateauing.
From The Wall Street Journal • Apr. 3, 2026
Bogdanova notes that after the 1990 Kuwait invasion, which knocked the market down by 16% over seven weeks, the market didn’t break even for an additional four months.
From Los Angeles Times • Apr. 3, 2026
August 2022 was the last time the national average for a gallon of gas hit $4, during the early months of Russia’s invasion of Ukraine.
From MarketWatch • Apr. 1, 2026
However, average prices are still below the record highs of $5.01 for gas and $5.81 for diesel, set in June 2022 in the aftermath of Russia's invasion of Ukraine.
From BBC • Mar. 31, 2026
On the first day of the invasion, in the first major battle of the war, the Germans, to their astonishment, met determined Belgian resistance.
From "The War to End All Wars: World War I" by Russell Freedman
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
