ˈkʌmbæk ɹɪd͡ʒˈɔ͡ɪndɚ ɹɛplɪˈkeɪʃən ɹɪˈtɜːn ɹɪˈtɝn ɹɪˈpəʊst ɹɪˈpoʊst (law) a pleading made by a defendant in response to the plaintiff's replication a quick reply to a question or remark (especially a witty or critical one) it brought a sharp rejoinder from the teacher