Singular
reparation

Plural
reparations

  1. (uncountable) (plural only) Reparations are the sums of money paid by one nation for the harms caused to another, often after a war.
    This house believes Britain owes reparations to her former colonies.
  2. (uncountable) (plural only) If you make reparations, you work to repair the damage you have done.
    She started making reparations by inviting him to visit her in Boston.