1. [verb] 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. [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

  3. [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

  4. [verb] penetrate or assault, in a harmful or injurious way; "The cancer had invaded her lungs"


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