A cadet may mean a future officer in the military, a junior branch of an important family, or simply a person who is a junior trainee.
As an adjective, "cadet" is used to signify a junior branch of a family. Thus, the Orleans line was a cadet branch of the Bourbon family. For the status as such, the noun cadency exists, as in the heraldic term mark of cadency for a feature which distinguishes a cadet son's coat of arms from the father's which is passed on unaltered only to the (usually firstborn) heir.
In Commonwealth countries, including United Kingdom, a cadet is a member of one of the cadet forces. In the United Kingdom these are the Combined Cadet Force, the Sea Cadets, Army Cadets and the Air Training Corps. Military officers in training are called officer cadets.
In Canada, the term "cadet" refers to an officer in training, with the official rank names as Officer Cadet for the Air Force and Army and Naval Cadet for the Navy. It also refers to any member of the Royal Canadian Army Cadets, Royal Canadian Air Cadets or Royal Canadian Sea Cadets. These three organizations are volunteer youth groups administered by the Department of National Defence.
In Germany, the rank Cadet (Seekadett) only exists in the German Navy for officers in training. In the Army and the Luftwaffe, officers in training usually have the rank of a Fahnenjunker or Ensign (German: Fähnrich) before they are promoted into the rank of a Lieutenant.
In Ireland, Cadet is a pupil of the Military College, which carries out officer training for the Air Corps, Army and Naval Service. Training takes 2 years and the Cadets are split into Senior and Junior Grades and Classes.
In Norway, a "cadet" is a pupil of either of the three the Krigsskolen ("war schools"), which educate commanding officers for either the Army, the Navy or to the Air Force.
In the United States, cadet refers to an officer in training. Students at the United States Military Academy, the United States Air Force Academy, the United States Coast Guard Academy, the Maine Maritime Academy, the Massachusetts Maritime Academy, the State University of New York Maritime College, and members of the Air Force and Army Reserve Officers' Training Corps officially rank as "Cadet" while holding varying cadet ranks in their individual organizations.
In Australia Cadet also refers to an officer in training. The official rank is Officer Cadet (OCDT) however OCDT's in the Royal Military College - Duntroon are referred to as Staff Cadet (SCDT) for historical reasons.
In Australia, a "Cadet" is a person aged between 13 and 20 who is a member of the Australian Defence Force Cadets (ADFC). The ADFC comprises the Australian Navy Cadets (ANC), the Australian Army Cadets (AAC), Australian Air Force Cadets (AAFC), which are funded by the Australian Government via the Department of Defence. Other cadet movements include the St John Ambulance Cadets (First Aid Services).
The program is sponsored by the Canadian Forces and funded through the Department of National Defence (DND) in partnership with the Army Cadet, Air Cadet, and Navy Leagues of Canada.
The term Cadet Movement applies when speaking of everyone associated with the program including the CF, DND, Leagues, Community Sponsors, Cadets, and parents and guardians of cadets.
St. John Ambulance in Canada supports a youth division that includes "cadets".
Two cadet corps are linked to Hong Kong colonial past:
Both are now funded by the Hong Kong government and has no ties to either the British Forces or the PLA.
In Ireland a cadet is a young member of the Order of Malta Ambulance Corps or the St. John Ambulance Brigade of Ireland.
In addition there are other non-national cadet organisations, namely the The Boys' Brigade in Singapore, Girls' Brigade, The Singapore Scout Association, Girl Guides Singapore, St. John Ambulance in Singapore and Red Cross Youth.
In the Merchant Navy, a Cadet is an officer under training in much the same way as the military context. Cadets choose either one of two branches for professional development. Deck Cadets train in the fields of Navigation, Shiphandling and Cargo Handling as well as Maritime Law. They will also receive training in firefighting, first aid and survival techniques. Engineering Cadets train to become Marine Engineers, and as such their fields encompass a range of theoretical and practical engineering subjects, including mechanical physics, thermodynamics, control engineering, applied mathematics, welding and fabrication. Engineering practice is mostly learned during the Cadet's assignment to a ship. Engineering Cadets also train in firefighting, survival and first aid. The cadet training scheme differs from country to country, but the learning objectives are always the same. In the UK for example, Cadets undergo training in a block-release format, spending a shorter time in college before going to sea for a short assignment after which the cadet returns to college. Other countries allow the cadet to finish his/her degree before going to sea, but most countries seem to prefer a system where a cadet completes all of his/her sea time before returning to college for the final year of their degree.
Cadet is also used in short track auto racing for the name of a category of cars. This division is usually a intermediate division that allows drivers to gain experience for faster classes in the future.
In Australia, the term is also used to describe a person pursuing a career as a Chartered Accountant under the "Cadetship" program, designed to accelerate career progression for motivated students. The programs are offered to students finishing high school or currently undertaking tertiary studies in relevant courses by several Accounting firms such as the Big 4 accountancy firms (Deloitte, KPMG, PricewaterhouseCoopers and Ernst & Young), and mid-tier firms such as BDO and Grant Thornton.
To refer to someone as a space cadet is to imply that they are "on another planet," i.e. foolish or unaware of their surroundings, for example, "That guy is a total space cadet." The phrase was inspired by science fiction author Robert A. Heinlein's juvenile novel Space Cadet.
"Cadet" may also refer to a member of The Cadets Drum and Bugle Corps, based in Allentown, Pennsylvania.
