One who is on probation.
One who is licensed to preach, but not ordained to a pastorate.
A chorister in their training period before full admission to a choir, whether or not that period is probationary.
An inexperienced recruit, especially in the police or armed forces.
A type of firecracker, used by farmers to scare rooks.
A novice.
An athlete either new to the sport or to a team or in his first year of professional competition, especially said of baseball, basketball, hockey and American football players.
non-professional; amateur