If people are reunited, or if they reunite, they meet each other again after they have been separated for some time.
例句
She and her youngest son were finally allowed to be reunited with their family...她和小兒子終于得到允許和家人團聚。She spent the post-war years of her marriage trying to reunite father and son...在戰后幾年的婚姻生活中，她千方百計想讓父子團聚。
V-ERG
（使）統一;（使）重新團結
If a divided organization or country is reunited, or if it reunites, it becomes one united organization or country again.
例句
...a federation under which the divided island would be reunited...將使這個分裂的島嶼實現統一的聯邦政府His first job will be to reunite the army.他的首要任務將是使軍隊重新團結一心。