An injunction is a court order that restrains (prevents) a party from doing something.  Commonly these are entered at the time of filing, Ex Parte (without giving the other side notice that they are being sought).. Usually they are used for restraining a party from removing a child from the custody of a parent, or taking the child outside of the jurisdiction of the court, or preventing a party from selling, dissipating, wasting, liquidating or dissolving marital assets, changing or stopping insurance coverage for the other party or child, changing employment benefits, etc.