The Cabinet of New Zealand is the New Zealand Government's body of senior ministers, accountable to the New Zealand Parliament. Cabinet meetings, chaired by the prime minister, occur once a week; in them, vital issues are discussed and government policy is formulated. Cabinet is also composed of a number of committees focused on specific areas of governance and policy. Though not established by any statute, Cabinet wields significant power within the New Zealand political system, with nearly all government bills it introduces in Parliament being enacted.

The King-in-Council or the Queen-in-Council, depending on the sex of the reigning monarch, is a constitutional term in a number of states. In a general sense, it refers to the monarch exercising executive authority, usually in the form of approving orders, on the advice of the country's privy council or executive council.