invasion

noun

in·​va·​sion in-ˈvā-zhən How to pronounce invasion (audio)
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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
While some remain in fair condition, others have fallen victim to hazards ranging from ancient invasions to modern development. Eli Wizevich, Smithsonian Magazine, 22 May 2025 Preventive Measures Cultural Practices Since this weed grows the best in open areas with poor soil, keeping your lawn grass thick and healthy is a great line of defense against an invasion. Mary Marlowe Leverette, Southern Living, 22 May 2025 Experts in South Africa say there is no evidence of whites being targeted for their race, although farmers of all races are victims of violent home invasions in a country with a high crime rate. Gerald Imray, Chicago Tribune, 21 May 2025 Experts in South Africa say there is no evidence of white people being targeted for their race, although farmers of all races are victims of violent home invasions in a country that suffers from a very high crime rate. Gerald Imray, Los Angeles Times, 21 May 2025 See All Example Sentences for invasion

Word History

Etymology

Middle English invasioun "assault, attack," borrowed from Anglo-French invasion, envasioun, borrowed from Late Latin invāsiōn-, invāsiō "attack, taking possession by violence," from Latin invādere "to enter with hostile intent, assault, attack" + -tiōn-, -tiō, suffix of verbal action — more at invade

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of invasion was in the 15th century

Browse Nearby Words

Cite this Entry

“Invasion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invasion. Accessed 28 May. 2025.

Kids Definition

invasion

noun
in·​va·​sion in-ˈvā-zhən How to pronounce invasion (audio)
: an act of invading
especially : entrance of an army into a country for conquest

Medical Definition

invasion

noun
in·​va·​sion in-ˈvā-zhən How to pronounce invasion (audio)
: 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 How to pronounce invasion (audio)
: the act of or an instance of invading

More from Merriam-Webster on invasion

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