- [verb] march aggressively into another's territory by military force for the purposes of conquest and occupation; "Hitler invaded Poland on September 1, 1939"
- [verb] to intrude upon, infringe, encroach on, violate; "This new colleague invades my territory"; "The neighbors intrude on your privacy"
Synonyms: intrude on, obtrude upon, encroach upon
- [verb] occupy in large numbers or live on a host; "the Kudzu plant infests much of the South and is spreading to the North"
Synonyms: overrun, infest
- [verb] penetrate or assault, in a harmful or injurious way; "The cancer had invaded her lungs"