Jail/dʒeɪl/ Definition 1 of 2Pro Tip 1/3Timeframe The length of a jail sentence can vary greatly based on the crime. He received a six-month jail term. Pro Tip 2/3Temporary Confinement Some people are held in jail temporarily before or during a trial. The suspect was in jail awaiting trial. Pro Tip 3/3Juvenile Detention Minors might be placed in a specialized juvenile jail for offenses. The teenager was sent to juvenile jail.