Learn how to say Invasions correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word invasion:
the act of invading with armed forces
any encroachment or intrusion ⇒ an invasion of rats
the onset or advent of something harmful, esp of a disease
(pathology) the spread of cancer from its point of origin into surrounding tissues
the movement of plants to a new area or to an area to which they are not native