When a court finds a party has not complied with (followed) a court order, that party is in contravention of (or has breached) the order.
Contravention is when the Court can punish the person who does not have a 'reasonable excuse' for breaching an Order. In parenting matters, the court will only consider that you have a 'reasonable excuse' if, for example, the person had to breach the parenting Order to protect the child or possibly that they did not understand they were breaching the parenting Order at the time.
An order of the Family Court that states a party has contravened a legally enforceable order regarding major long term issues (ie.) parental responsibilities.