What is difference between no say order and expartee order

I have not heard anything like a no say order seriously. If the application is not contested by the opponent it must be allowed exparte. If its not contested by the applicant , it must be dismissed. However in both the cases the order is not passed on merits. Except the above, the judge in his discretion can close the applications without passing any order, but such a situation arises only under certain circumstances, for example an interim application is not disposed before the commencment of trial , then in such case the application can be closed without disposal. 

The learned members if any who has come across this term may explain..