invasion

/ɪnˈveɪʒən/

IPA: /IH0 N V EY1 ZH AH0 N/

noun
  1. 1

    A military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.

  2. 2

    The entry without consent of an individual or group into an area where they are not wanted.

    an invasion of bees

  3. 3

    The spread of cancer cells, bacteries and such to the organism.

  4. 4

    The breaching of the skin barrier.

Source: https://en.wiktionary.org/wiki/invasion