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 nonnative 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

The chemotherapy was less invasive as well, suggesting that, to be successful, treatments and their side-effects may not need to be as intensive for future HIV patients. Jill Kiedaisch, Popular Mechanics, "A Patient with HIV Has Gone Into Remission—Only the Second Case in Recorded Medical History," 6 Mar. 2019 This plant is horrifically invasive and should never be planted. Neil Sperry, star-telegram, "Volunteering is great but 'volunteer' plants are a whole different story," 1 June 2018 Another unknown: Whether $2 million da Vinci machines are actually more effective than non-robotic laparoscopic surgery, which is also minimally invasive and often thousands of dollars cheaper. Zoie Matthew, Los Angeles Magazine, "How a USC Program Is Trying to Make Robotic-Assisted Surgeries Safer," 3 Apr. 2018 The result is often a diagnosis at an advanced stage, when treatments are more invasive and less likely to be successful. Melissa Healy, latimes.com, "Modified Pap tests can show early warning signs of other gynecological cancers," 22 Mar. 2018 Alford has more than 35 years of experience providing neuropsychological evaluations and implementing therapies such as neurofeedback and non-invasive neuro-stimulation techniques. Michelle Mullins, Naperville Sun, "Naperville People in the News," 13 July 2018 The American Civil Liberties Union publicized the existence of the document, which acknowledges that running facial recognition technology on unaware visitors could be invasive. Recode Staff, Recode, "Recode Daily: Going for a ride in Waymo’s just-launched driverless taxi service," 6 Dec. 2018 Apple is far less invasive about tracking your streaming habits. Chris Welch, The Verge, "The best streaming video player to buy right now," 30 Nov. 2018 The one- to three-hour procedure (larger breasts take longer) is typically done under local anesthesia or IV sedation, and is considered to be minimally invasive. Jolene Edgar, Harper's BAZAAR, "Everything You Need To Know About The Non-Surgical Breast Lift," 17 Aug. 2018

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

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Statistics for invasive

Last Updated

19 Mar 2019

Look-up Popularity

Time Traveler for invasive

The first known use of invasive was in 1598

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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

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More from Merriam-Webster on invasive

Rhyming Dictionary: Words that rhyme with invasive

Spanish Central: Translation of invasive

Nglish: Translation of invasive for Spanish Speakers

Britannica English: Translation of invasive for Arabic Speakers

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