Definition of alliances:
(n) :
(countable) A union or connection of interests between families, states, parties, etc., especially between families by marriage and states by compact, treaty, or league.
(n) :
(countable) The act of allying or uniting.
(n) :
(uncountable) The state of being allied.
(n) :
(countable) Any union resembling that of families or states; union by relationship in qualities; affinity.
(n) :
(with the definite article) The persons or parties allied.
(n) :
(dated or India) Marriage.