n.[U]

1. 检验；鉴定
2. 试用；见习；试读
   He was a mechanic who was on probation.

   他是一名见习机械工。

3. 试用期；见习期；试读期
4. 【律】缓刑

n.

1. Law  the release of an offender from detention, subject to a period of good behaviour under supervision.
2. the process of testing or observing the character or abilities of a person who is new to a role or job.