invasive (Adjective) — (medicine) relating to a technique in which the body is entered by puncture or incision.
invasive (Adjective) — Marked by a tendency to spread especially into healthy tissue. ex. "invasive cancer cells"
invasive (Adjective) — Involving invasion or aggressive attack. ex. "invasive war"
invasive (Adjective) — Gradually intrusive without right or permission. ex. "invasive tourists"