move to and fro; "The shy student lingered in the corner"
be undecided about something; waver between conflicting positions or courses of action; "He oscillates between accepting the new position and retirement"
(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