(law) a way of dealing with offenders without imprisoning them; a defendant found guilty of a crime is released by the court without imprisonment subject to conditions imposed by the court; "probation is part of the sentencing process"
a trial period during which an offender has time to redeem himself or herself
a trial period during which your character and abilities are tested to see whether you are suitable for work or for membership
an estimation that is too low; an estimate that is less than the true or actual value
make too low an estimate of; "he underestimated the work that went into the renovation"; "Don't underestimate the danger of such a raft trip on this river"