rapprochement /räprôshmäN″/ [Fr, rapprocher, to bring together] , (in child development) a subphase of the separation-individuation phase of Mahler’s system of child development. This subphase occurs from approximately 14 months to 2 years or more. This stage is characterized by a rediscovery of and reestablishment with the mother or a significant nurturer in an attempt to have needs met.