Officer in training.

A soldier in training for officership.

a leader in training

an officer in the making

A gentleman who carries arms in a regiment, as a volunteer, with a view of acquiring military skill and obtaining a commission.

A young man in training for military or naval service; esp. a pupil in a military or naval school, as at West Point, Annapolis, or Woolwich.

In New Zealand, a young gentleman learning sheep farming at a station; also, any young man attached to a sheep station.

A young man who makes a business of ruining girls to put them in brothels.

a person who is junior in some way

a small sailing dinghy

a junior member or branch of a family.

The Cadet is a junior trainer sailing dinghy designed by Jack Holt, who was commissioned to design it by the magazine Yachting World. The boat is crewed by 2 young people and sails with a bermuda rigged mainsail, jib and spinnaker. The side decks are designed so that a capsize normally does not fill the hull with water.