v.
- enter (a country) as or with an army so as to subjugate or occupy it.
▸enter in large numbers, especially intrusively.
▸(of a parasite or disease) attack and spread into (an organism or bodily part).
- intrude on:
he felt his privacy was being invaded.
Derivative
Etymology
ME: from L. invadere, from in- ‘into’ + vadere ‘go’.