in·​vade | \in-ˈvād \
invaded; invading

Definition of invade 

transitive verb

1 : to enter for conquest or plunder

2 : to encroach upon : infringe

3a : to spread over or into as if invading : permeate doubts invade his mind

b : to affect injuriously and progressively gangrene invades healthy tissue

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Other Words from invade

invader noun

Synonyms for invade


foray (into), overrun, raid

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Choose the Right Synonym for invade

trespass, encroach, infringe, invade mean to make inroads upon the property, territory, or rights of another. trespass implies an unwarranted or unlawful intrusion. hunters trespassing on farmland encroach suggests gradual or stealthy entrance upon another's territory or usurpation of another's rights or possessions. the encroaching settlers displacing the native peoples infringe implies an encroachment clearly violating a right or prerogative. infringing a copyright invade implies a hostile and injurious entry into the territory or sphere of another. accused of invading their privacy

Examples of invade in a Sentence

The troops invaded at dawn. When tourists invade, the town is a very different place. The cancer eventually invaded the brain. Weeds had invaded the garden. Bacteria invaded and caused an infection.
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Recent Examples on the Web

Such openness stems from Catalonia’s location, on the Mediterranean Sea and along the Pyrenees mountains, and its history as a magnet for migrants and invading armies. Elaine Heinzman, Smithsonian, "How Soup Nourishes Barcelona’s Tradition of Welcoming Immigrants," 30 June 2018 That is usually not a problem because the grass is invading the garden space to take advantage of the water being applied. Calvin Finch, San Antonio Express-News, "It’s early, but you may want to pull your tomatoes now," 22 June 2018 In Grafton, New Hampshire, black bears have started killing domestic animals, invading personal space, even smacking one woman, creating a psychic and territorial battle between residents and the otherwise shy Ursus americanus. Aaron Gilbreath, Longreads, "Small-Town New Hampshire’s Battle with Bears and Liberty," 5 June 2018 Ironically, this often involves Vanzant being animated, yelling, and occasionally invading the personal space of her guests., "Iyanla: Fix My Life Is Proof That Sometimes Our Aunties Get It Wrong," 3 May 2018 Justin Bieber has had enough with people invading his personal space. Noelle Devoe, Seventeen, "Justin Bieber Smacks Phone Out of Fan’s Hand for Invading His Space After Soccer Game," 9 Apr. 2018 And don't take those silly quizzes on Facebook that invade your privacy. Teresa Dixon Murray,, "23 tips to help you avoid consumer scams: Money Matters (video)," 18 Mar. 2018 But there is nothing new about big countries bending smaller neighbours to their will without invading them. The Economist, "Autonomous weapons are a game-changer," 25 Jan. 2018 A few months later, North Korea invaded South Korea and by September 1950, the U.S. military hastily joined a United Nations force to defend South Korea. Carole Carlson, Post-Tribune, "67 years later, Gary soldier gets military funeral: 'My family is just so happy to have him home'," 24 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'invade.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of invade

15th century, in the meaning defined at sense 1

History and Etymology for invade

Middle English, from Latin invadere, from in- + vadere to go — more at wade

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Statistics for invade

Last Updated

12 Dec 2018

Look-up Popularity

Time Traveler for invade

The first known use of invade was in the 15th century

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More Definitions for invade



English Language Learners Definition of invade

: to enter (a place, such as a foreign country) in order to take control by military force

: to enter (a place) in large numbers

: to enter or be in (a place where you are not wanted)


in·​vade | \in-ˈvād \
invaded; invading

Kids Definition of invade

1 : to enter by force to conquer or plunder

2 : to show lack of respect for She invaded their privacy.

Other Words from invade

invader noun
in·​vade | \in-ˈvād \
invaded; invading

Medical Definition of invade 

1 : to enter and spread within either normally (as in development) or abnormally (as in infection) often with harmful effects protect the body from invading viruses branches of a nerve invade the skin area

2 : to affect injuriously and progressively gangrene invades healthy tissue

Other Words from invade

invader \-​ˈvād-​ər \ noun

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invaded; invading

Legal Definition of invade 

1 : to encroach upon : infringe invading a constitutional right

2 : to make payments out of (a fund from which payments are not ordinarily made) authorized the trustee to invade the principal for educational expenses

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More from Merriam-Webster on invade

Rhyming Dictionary: Words that rhyme with invade

Thesaurus: All synonyms and antonyms for invade

Spanish Central: Translation of invade

Nglish: Translation of invade for Spanish Speakers

Britannica English: Translation of invade for Arabic Speakers

Comments on invade

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a nest or breeding place

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