Definition of paction in English:

paction

Pronunciation /ˈpakʃən/

noun

Scottish
  • The action of making a bargain or pact; a bargain, agreement, covenant.

    In Scots Law sometimes: specifically an unofficial agreement, as distinct from a legally binding contract.

Origin

Late Middle English. From Middle French paction, paccion and its etymon classical Latin pactiōn-, pactiō agreement, settlement from pact-, past participial stem of paciscere to arrange by negotiation, agree + -iō.