invade meaning and definition

INVADE verb

Definition of invade (verb)

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