A rapprochement is an increase in friendliness between two countries, groups, or people, especially after a period of unfriendliness. There have been growing signs of a rapprochement with Vietnam. the process of political rapprochement between the two former foes. = reconciliation. the establishment of a good relationship between two countries or groups of people, after a period of unfriendly relations rapprochement between/with (rapprocher )