invasive

adjective
in·​va·​sive | \ in-ˈvā-siv How to pronounce invasive (audio) , -ziv \

Definition of invasive

 (Entry 1 of 2)

1 : tending to spread especially in a quick or aggressive manner: such as
a of a non-native organism : growing and dispersing easily usually to the detriment of native species and ecosystems It will be the second Australian insect released to thwart melaleuca, one of many exponentially spreading invasive plants that out-compete native Florida species, monopolizing wetlands and natural areas.— Neil Santaniello Scientists say more than 150 invasive species have entered the Great Lakes, multiplying rapidly and feeding on native species or outcompeting with them for food.— Sophia Taren
b(1) of cancer cells : tending to infiltrate surrounding healthy tissue … this procedure preserves the architecture of the tissue sample, which is vital for determining whether tumor cells are invasive.— Andrew A. Skolnick
(2) of a pathogenic microorganism or disease : disseminating from a localized area throughout the body sepsis association with invasive bacteria invasive streptococcal infection
2 : involving entry into the living body (as by incision or by insertion of an instrument) invasive diagnostic techniques
3 : of, relating to, or characterized by military aggression
4 : tending to infringe

invasive

noun

Definition of invasive (Entry 2 of 2)

: an organism that is not native to the place where found and tends to grow and spread easily usually to the detriment of native species and ecosystems Zebra mussels are the latest in a series of aquatic invasives to threaten Texas' inland waters.— Shannon Tompkins

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Other Words from invasive

Adjective

invasiveness noun

Examples of invasive in a Sentence

Recent Examples on the Web: Adjective Its rainforest habitat has been severely degraded by invasive plants and goats, as well as fires. John R. Platt, Scientific American, "What We've Lost: The Species Declared Extinct in 2020," 13 Jan. 2021 The storm also played a role in bringing the Asian citrus psyllid to Louisiana, an invasive insect that feeds on the fruits' stems and leaves and spreads an incurable plant disease. Halle Parker | Staff Writer, NOLA.com, "Louisiana's citrus hub has struggled with hurricanes, erosion, aging farmers. What's next?," 1 Jan. 2021 The invasive insect is normally found in China, Japan, Thailand, South Korea, Vietnam and other Asian countries. CBS News, "Scientists kill 85 "murder hornets" and capture 13 alive: "This is only the start"," 28 Oct. 2020 The invasive insect is normally found in China, Japan, Thailand, South Korea, Vietnam and other Asian countries. NBC News, "Crews vacuum 'murder hornets' out of Washington nest," 25 Oct. 2020 The invasive insect is normally found in China, Japan, Thailand, South Korea, Vietnam and other Asian countries. Nicholas K. Geranios, chicagotribune.com, "Washington state discovers first nest of ‘murder hornets’ in the United States," 23 Oct. 2020 An invasive insect that has devastated vineyards, beer hop fields, orchards and other crops in several mid-Atlantic states, may be finding a home in Connecticut. Christopher Arnott, courant.com, "Invasive insect, a danger to vineyards, beer hops, found in Connecticut," 16 Oct. 2020 The disease is caused by bacteria carried by an invasive insect called the Asian citrus psyllid. Theresa Machemer, Smithsonian Magazine, "How the Australian Finger Lime Could Save American Citrus," 29 July 2020 The curriculum includes concepts such as wetland habitat, invasive species impacts, the multiple lines of defense concept, how oil spills affect wetlands, restoration techniques within the state’s coastal Master Plan and more. NOLA.com, "Register to vote in upcoming election by Feb. 17," 1 Feb. 2021 Recent Examples on the Web: Noun Also avoid porcelainberry, which is poisonous and a foreign invasive. Ellen Nibali, baltimoresun.com, "Garden Q&A: On wild grapes and gutter muck," 19 Nov. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'invasive.' 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 invasive

Adjective

1598, in the meaning defined at sense 3

Noun

1990, in the meaning defined above

History and Etymology for invasive

Adjective

earlier, "attacking, offensive," going back to Middle English invasif "offensive (of weapons)," borrowed from Middle French and Medieval Latin; Middle French, borrowed from Medieval Latin invāsīvus, from Latin invāsus, past participle of invādere "to enter with hostile intent, assault, attack" + -īvus -ive — more at invade

Noun

derivative of invasive entry 1

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Time Traveler for invasive

Time Traveler

The first known use of invasive was in 1598

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Statistics for invasive

Last Updated

21 Feb 2021

Cite this Entry

“Invasive.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invasive. Accessed 2 Mar. 2021.

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More Definitions for invasive

invasive

adjective

English Language Learners Definition of invasive

: tending to spread
medical : involving entry into the body by cutting or by inserting an instrument

invasive

adjective
in·​va·​sive | \ -siv, -ziv How to pronounce invasive (audio) \

Medical Definition of invasive

1 : tending to spread especially : tending to invade healthy tissue invasive cancer cells
2 : involving entry into the living body (as by incision or by insertion of an instrument) invasive diagnostic techniques

Other Words from invasive

invasiveness noun

More from Merriam-Webster on invasive

Nglish: Translation of invasive for Spanish Speakers

Britannica English: Translation of invasive for Arabic Speakers

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