rec ‧ on ‧ cil ‧ i ‧ a ‧ tion /ˌrekənsɪliˈeɪʃ ə n/ BrE AmE noun [singular, uncountable]
1 . a situation in which two people, countries etc become friendly with each other again after quarrelling:
Her ex-husband had always hoped for a reconciliation.
reconciliation between/with
The meeting achieved a reconciliation between the groups.
his reconciliation with his brother
The treaty has brought a new spirit of reconciliation on both sides.
The leadership announced a programme of national reconciliation (=an attempt by all sides to end a war or trouble in a country) .
2 . the process of finding a way that two beliefs, facts etc that are opposed to each other can both be true or successful
reconciliation between
a reconciliation between environment and development