|1.||a. an alliance or union between groups, factions, or parties, esp for some temporary and specific reason|
|b. (as modifier): a coalition government|
|2.||a fusion or merging into one body or mass|
|[C17: from Medieval Latin coalitiō, from Latin coalēscere to |
An alliance of political groups formed to oppose a common foe or pursue a common goal.
Note: In countries with many political parties, none of which can get a majority of the citizens' votes, the only way an effective government can be formed is by a coalition of parties. Such coalitions are often unstable.