invade
Americanverb (used with object)
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to enter forcefully as an enemy; go into with hostile intent.
Germany invaded Poland in 1939.
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to enter like an enemy.
Locusts invaded the fields.
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to enter as if to take possession.
to invade a neighbor's home.
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to enter and affect injuriously or destructively, as disease.
viruses that invade the bloodstream.
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to intrude upon.
to invade the privacy of a family.
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to encroach or infringe upon.
to invade the rights of citizens.
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to permeate.
The smell of baking invades the house.
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to penetrate; spread into or over.
The population boom has caused city dwellers to invade the suburbs.
verb (used without object)
verb
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to enter (a country, territory, etc) by military force
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(tr) to occupy in large numbers; overrun; infest
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(tr) to trespass or encroach upon (privacy, etc)
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(tr) to enter and spread throughout, esp harmfully; pervade
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(of plants, esp weeds) to become established in (a place to which they are not native)
Other Word Forms
Derived Forms
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invadernoun
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uninvadedadjective
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invadableadjective
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reinvadeverb (used with object)
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quasi-invadedadjective
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uninvadableadjective
Conjugated Forms
Present
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have invadedperfect
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has invadedperfect 3rd person singular
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am invadingprogressive 1st person singular
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invadessingular 3rd person
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is invadingprogressive 3rd person singular
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are invadingprogressive
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have been invadingperfect progressive
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invadingparticiple
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has been invadingperfect progressive 3rd person singular
Past
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had invadedperfect
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had been invadingperfect progressive
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invadedsimple
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invadedparticiple
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were invadingprogressive plural
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was invadingprogressive singular
Future
Etymology
Origin of invade
First recorded in 1485–95; from Latin invādere, from in- in- 2 + vādere “to go, walk” ( see also wade)
Explanation
When you Invade, you aggressively take over or occupy a place. If a country's leader wants to gain more land, the military might invade a neighboring country. Not everything that invades is militaristic. Some things that invade are cultural, such as the phenomena of young, stylish people moving into a neighborhood that had never been thought of as cool before. In an instant, new restaurants and shops catering to the newcomers open and soon the area is overrun with people wearing, say, skinny jeans and complicated eyewear. Natives to the area lament, "This place has been invaded by hipsters."
Vocabulary lists containing invade
"To Kill a Mockingbird" by Harper Lee, Chapters 12–15
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Bronx Masquerade
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Beowulf vocabulary
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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.
Their work helps answer longstanding questions about how these viruses launch replication once they invade a cell.
From Science Daily • May 13, 2026
Citing sources in the Danish government, it reported that soldiers, medical supplies and blood were flown into Greenland in January to blow up key airport runways over fears that Trump would invade the arctic island.
From Salon • Mar. 27, 2026
Myra P. Saefong and Claudia Assis considered the potential for additional disruption to energy commodity prices if the U.S. were to invade Iran’s Kharg Island.
From MarketWatch • Mar. 27, 2026
It's only in a tiny number of cases that the bacteria cross the barriers inside our nose to invade the body and cause meningitis and sepsis.
From BBC • Mar. 18, 2026
The clouds still circled the sky, threatening to invade at any moment, but for now the sun shone bravely in its halo of blue sky.
From "Twilight" by Stephenie Meyer
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.
