Definition of “invasive” - English Dictionary

“invasive” in British English

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uk /ɪnˈveɪ.sɪv/ us /ɪnˈveɪ.sɪv/

moving into all areas of something and difficult to stop:

an invasive disease
They treated the cancer with non-invasive methods/surgery (= not cutting into the body).

An invasive organism is one that has arrived in a place from somewhere else and has a harmful effect on that place:

The Asian long-horned beetle is one of the newest and most harmful invasive species in the United States.

(Definition of “invasive” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“invasive” in American English

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us /ɪnˈveɪ·sɪv/

invasive adjective (SPREADING)

tending to spread in an uncontrollable way:

invasive plant species
medical invasive cancer cells

invasive adjective (MEDICAL PROCESS)

medical done by cutting into or putting something into the body:

(Definition of “invasive” from the Cambridge Academic Content Dictionary © Cambridge University Press)