alliance

/AH0 L AY1 AH0 N S/
noun
  1. 1

    The state of being allied.

    โ€œmatrimonial alliances; an alliance between church and state, or between two countriesโ€

  2. 2

    The act of allying or uniting.

  3. 3

    A union or connection of interests between families, states, parties, etc., especially between families by marriage and states by compact, treaty, or league.

  4. 4

    Any union resembling that of families or states; union by relationship in qualities; affinity.

  5. 5

    (with the definite article) The persons or parties allied.

verb
  1. 1

    To connect or unite by alliance; to ally.

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