Also found in: Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.


1. Of, engaging in, or given to armed aggression: an invasive military force.
a. Of or relating to a disease or condition that has a tendency to spread, especially into healthy tissue: an invasive carcinoma.
b. Of or relating to a medical procedure in which a part of the body is entered, as by puncture or incision.
3. Tending to spread widely in a habitat or ecosystem. Used especially of nonnative species: an invasive grass.
4. Tending to intrude or encroach, as upon privacy.
An invasive species or organism.

[Middle English, from Old French invasif, from Medieval Latin invāsīvus, from Latin invāsus, past participle of invādere, to invade; see invade.]

in·va′sive·ly adv.
in·va′sive·ness n.


the state or quality of being invasive
References in periodicals archive ?
Designed to improve the patient experience and increase the willingness of individuals to participate in recommended colorectal cancer screening, C-Scan removes many frequently-cited barriers, such as laxative bowel preparation, invasiveness, and sedation.
Some studies have shown that loss of adhesion protein expression may be involved in the pathogenesis of pituitary adenomas and contribute to tumor aggressiveness and invasiveness (4-7).
Invasiveness, one of the properties of tumor progression, contains the tumor's ability to expand into the host tissue due to biochemical and biomechanical processes.
The higher Gal-3 expressions were detected in samples with deeper invasiveness than those with superficial invasiveness before (?
Tenders Are Invited for Analysis of the degree of invasiveness of alien species in Poland, together with an indication of species that seriously threaten native flora and fauna (.
2-5) In light of this reportedly high complication rate, it is important to stratify risks of complications by the variability of invasiveness of operative procedures.
In addition, a drug test is worlds apart from the invasiveness of a penile swab, because, after a penile swab, the accused's DNA would be transferred onto the swab, and thus would be in the hands of investigators.
It utilises a helium ionization process to produce a stable, focused beam of ionized gas that provides greater precision, minimal invasiveness and an absence of conductive currents through the patient during surgery.
Knowing which cells are best for the therapy should not only improve patient outcome, but also reduce the number of cells required, which would further reduce both the time of the preparation and invasiveness of the procedure.
Individual contributions are focused on Morrison and Bathos, the death of the author in Suicide Squad #58, the invasiveness of language in Grant MorrisonAEs comics, and a wide variety of other related subjects.
First, based on 13 questions that assess impacts, invasiveness and distribution, the California Invasive Plant Council's list includes 214 species that cause ecological harm in the state's wildlands (Cal-IPC 2013).