Anish,
Was the notice served to your wife? Is receipt note for notice rceipt on the file?
Quashing is a type of case - where you/your advocate will prepare application and sumit it to court. There are certain basis on which quash is granted. Success rate of quash is less - but in your cases there is a good chance.
And Yes quash is common term in lawyers dictionary.
Quashing runs in respective high court - so Ghaziabad case quash application will run in Allahabad/Lucknow and Delhi(125 Crpc) will run in Delhi High Court.
Is she is also not attending Crpc 125?