Probationary (adjective)

1. Serving as a trial or test.
2. Of or during a period of probation.
3. Of or for a person on probation.

Origin:

Late 16th century: from medieval latin probationarius, from latin probatio(n-), from probare "prove".

Examples:

1. The new employee is on probationary period for three months.
2. The probationary officer is still undergoing training.
3. He was given a probationary sentence for his crime.
4. The students were placed on probationary status for their poor academic performance.
5. The company has a probationary period for new hires during which they are evaluated.