A national unity government, government of national unity, or national union government is a broad coalition government consisting of all parties in the legislature, usually formed during a time of war or other national emergency. It is a special type of coalition with a particularly broad base, including all the major parties represented in the parliament. The purpose of a unity government is to create a base of solidarity and provide the political system with a "time-out," during which important decisions that fall into the national consensus can be made.

A unity government lacks opposition, or opposition parties are too small and negligible. It is usually formed during a time of crisis, such as war or economic instability, and is intended to promote national unity and political stability. The Israeli unity government, for example, was formed to oversee Israels war with Hamas in Gaza.

In a unity government, all parties in the legislature are represented, and the government is based on a broad coalition. The members of the coalition include representatives of rival parliamentary groups. The most important action of a unity government is to establish the unity of the nation. The unity government can make important decisions that fall into the national consensus.

In summary, a unity government is a broad coalition government consisting of all parties in the legislature, usually formed during a time of crisis to promote national unity and political stability. It lacks opposition, and all major parties are represented. The purpose of a unity government is to create a base of solidarity and provide the political system with a "time-out," during which important decisions that fall into the national consensus can be made.