What is the meaning of invading?

verb

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

adjective

• Involving invasion or aggressive attack.
  • usage: "invasive war"
  • synonyms: incursive, invasive