1

invasive

adjective in·va·sive \ in-ˈvā-siv , -ziv \
Updated on: 13 Dec 2017

Definition of invasive

1 : of, relating to, or characterized by military aggression
2 : 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
3 : tending to infringe
4 : involving entry into the living body (as by incision or by insertion of an instrument)
  • invasive diagnostic techniques

invasiveness

noun

Recent Examples of invasive from the Web

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.

First Known Use of invasive

1598


2

invasive

noun

Definition of invasive

: 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

First Known Use of invasive

1990


Medical Dictionary

invasive

adjective in·va·sive \ -siv, -ziv \

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

invasiveness

noun


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