invasion

Noun
  1. The act of invading;
    The act of an army that invades for conquest or plunder (synset 100978617)
  2. Any entry into an area not previously occupied (synset 107444576)
    "an invasion of tourists"; "an invasion of locusts"
  3. (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body (synset 107346913)
    "the tumor's invasion of surrounding structures"

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