Step 1: Meaning.
An ex-parte decree is a decree passed when the defendant, despite proper service of summons, does not appear in court.
Step 2: Provision.
Order IX Rule 6 CPC allows the court to proceed ex-parte if the defendant does not appear.
Step 3: Remedy.
Defendant may apply to set aside ex-parte decree under Order IX Rule 13 CPC if he shows sufficient cause for non-appearance.
Step 4: Conclusion.
Thus, an ex-parte decree is one passed in absence of the defendant.