A union or connection of interests between families, states, parties, etc., especially between families by marriage and states by compact, treaty, or league. (noun)
Any union resembling that of families or states; union by relationship in qualities; affinity. (noun)
The persons or parties allied. (noun)
To connect or unite by alliance; to ally. (verb)
Examples of word alliance
For my part, I have to say that whether there be such an alliance depends, so far as I know, upon what may be a right definition of the term alliance.
In a letter to the Vienna Tageblatt, he advocates an economic alliance among the Continental nations for the purpose of barring out American goods, an economic alliance, in his own language, "_which may possibly and desirably develop into a political alliance_."
In announcing Key's visit, the White House said the leaders would discuss "the close friendship and partnership between our two countries" -- a sign of growing ties, but a notch below using the term alliance.
You know there's going to be a showdown over some communications technology issue when Google, Best Buy, Mitsubishi, Sony, TiVo and two other big companies start a new group with the word "alliance" in it.
Lavrov said NATO should commit to "legally binding" security arrangements through the Vienna-based OSCE to cure what he called the alliance's appetite "for more and more scenarios" of unilateral actions.