US government shutdown: key definitions Shutdown: The US Constitution requires Congress to regularly pass laws funding the government. On the relatively rare occasions that Congress fails to do so on time, a government shutdown begins. This does not mean that the US currently has no government. Services vital to law and order, such as prison security or border patrol, will continue to function as normal. Most other departments will remain open, but only a minority of their staff will report to work and they will perform only their most basic functions. Some government institutions, such as national parks, museums, and memorials, are closed entirely. Furlough: Some 800,000 government employees have been placed on furlough due to the shutdown, meaning that they will not report to work, and will not be paid. Following the last government shutdown in 1996, however, all furloughed employees were paid retroactively. Non-essential: Most government departments are still expected to perform certain tasks during a shutdown. They have been forced to divide their workforce into those essential , and those who are non-essential. Non-essential workers have been placed on furlough, while essential workers continue to report to work. The official government language has been changed to "excepted" and "non-excepted" employees, but people in Washington and in the media continue to refer to essential and non-essential workers. Continuing resolution (CR): In recent years, Congress has been increasingly unable or unwilling to pass a full annual budget. Instead they have passed continuing resolutions, which fund the government for a shorter period of time. The prevalence of short term CR's has led to more frequent, and often highly contentious, debates over government funding. The Democrats are currently pushing for a "clean" CR, meaning a law designed simply to fund the government with no additional measures attached. Republicans are attempting to tie the CR to funding for Obamacare, a tactic which the Democrats have repeatedly rejected. Both sides anticipate a CR which will fund the government for as little as 6 weeks, indicating that the next budget showdown is not far off. Debt ceiling: The debt ceiling is the cap on the amount of money that the government can borrow. It first came about in 1917, and since 1960 the government has raised it 78 times. The debt ceiling is currently set at $16.7 trillion, but it is estimated that this limit will be exceeded on October 17. Should the debt ceiling not be raised by that time, the US will begin to default on its debt for the first time in its history. When that nearly happened in 2011, it caused the US credit rating to be downgraded. Small-government Republicans have indicated that they will demand consessions from Democrats on spending in order to raise the debt ceiling, while President Obama has said he will not negotiate on this issue, as defaulting on the national debt would make Americans "deadbeats." IIf the debt ceiling is not raised on time there would be potentially catastrophic economic consequences.