Reserve can mean several things;

1. It can mean a place :

• Where species of flora (plants) and fauna (animals) can be protected and preserved from extinction. Examples include nature reserves and game reserves.

See also: Wildfowl and Wetlands Trust, National Nature Reserve

• In Canada, a reserve is a First Nations community recognized by the Indian Act, similar to what are called Indian reservations in the United States. The term "reservation" should not be used interchangeably with "reserve" in this context.

• A place name for several places in the United States:
  • Reserve, Kansas
  • Reserve, Louisiana
  • Reserve, Montana
  • Reserve, New Mexico
  • Reserve, Wisconsin

2. A reserve can also mean a stockpile for future use. In economics it can be a stockpile of some commodity (such as oil) or most importantly a stockpile of money or monetary assets. Examples include the Federal Reserve of the United States of America. In biology, the most commonly used definition of species was first coined by Ernst Mayr. ... In Botany a Flora (or Floræ) is a collective term for plant life and can also refer to a descriptive catalogue of the plants of any geographical area, geological period, etc. ... Fauna is a collective term for animal life. ... In biology and ecology, extinction is the ceasing of existence of a species or group of taxons. ... A nature reserve (natural reserve, nature preserve, natural preserve) is an area of importance for wildlife, flora, fauna or features of geological or other special interest, which is reserved and managed for conservation and to provide special opportunities for study or research. ... A game reserve is an area of land set aside for maintenance of wildlife for tourism or hunting purposes. ... Statue of Sir Peter Scott at WWT London Wetlands Centre The Wildfowl and Wetlands Trust is a wildfowl and wetland conservation charity in the United Kingdom and the largest international wetland conservation charity. ... National Nature Reserve is a United Kingdom government conservation designation for a nature reserve of national significance. ... In Canada, an Indian reserve is specified by the Indian Act as a tract of land, the legal title to which is vested in Her Majesty, that has been set apart by Her Majesty for the use and benefit of a band. ... Carved mask in Vancouver First NationsRawr Im a lion! is a term of ethnicity used in Canada that is meant to replace the use of the word Indian. It refers to the Indigenous peoples of North America located in what is now Canada, and their descendants, who are not... The Indian Act of Canada (1876) (full title An Act respecting Indians) is an Act which establishes the rights of registered Indians and of their bands. ... In the United States an Indian reservation is land which is managed by a Native American tribe under the United States Department of the Interiors Bureau of Indian Affairs. ... Reserve is a city located in Brown County, Kansas. ... Reserve is a census-designated place and town in St. ... Reserve is a census-designated place located in Sheridan County, Montana. ... Reserve is a village located in Catron County, New Mexico. ... Reserve is a census-designated place located in Sawyer County, Wisconsin. ... Reserves are banks holding of deposits in accounts with their national bank (for instance, the Federal Reserve), plus currency that is physically held by banks (vault cash). ... The Federal Reserve System is headquartered in the Eccles Building on Constitution Avenue in Washington, DC. The Federal Reserve System (also the Federal Reserve; informally The Fed) is the central banking system of the United States. ...

3. In military terms a reserve can mean forces (or army) held back from battle in order to deal with unforseen contingencies, or to exploit successes, or to relieve troops that have lost their effectiveness. It can also mean troops not part of a permanent standing army, especially volunteer reserve or a reserve component of the United States military. The Military Reserves are an organization that is associated with the military but is not in active duty. ... Army reserves are a part of an army which is normally activated only during emergencies such as a war. ... A reserve component of the United States military is an organization of servicemembers who generally perform a minimum of 39 days of military duty per year and who augment the active duty (or full time) military when necessary. ... The armed forces of the United States of America consist of the United States Army United States Navy United States Air Force United States Marine Corps United States Coast Guard Note: The United States Coast Guard has both military and law enforcement functions. ...

4. In academic library terms reserve usually refers to course reserves, or materials set aside by the library for a particular course or other academic use. Course reserve is a term used in academic libraries to describe materials set aside for a specific academic course or other use. ...

5. In legal terms, a judge may reserve a decision in a case, which means that he takes time to consider the judgment rather than delivering it straight after hearing the parties to the case. A reserved judgment is usually delivered in written form. Compare ex tempore. Reserved decision is a legal term. ... Ex tempore is a legal term that means at the time. A judge who hands down a decision in a case soon or straight after hearing it is delivering a decision ex tempore. ...