Definition of coalitions:
(n) :
A temporary group or union of organizations, usually formed for a particular advantage.
(n) :
(rare) The collective noun for a group of cheetahs.
(n) :
Any of several series of nations allied against France in the Napoleonic Wars; in the War of the First Coalition, War of the Second Coalition, etc.
(n) :
(Australia, politics, slang, mildly derogatory) The Coalition of the Liberal Party and the National Party, emphasising its pro-coal policies.
(n) :
(US, politics) Ellipsis of Coalition of the Willing (“the coalition of nations operating under United States command against Iraq, in the U.S.-Iraq War (Gulf War II; "Iraq War") and its aftermath”).
(n) :
(Australia, politics) Ellipsis of Coalition of the Liberal Party and National Party, the Liberal-National coalition.