what does ans and special defense mean in a foreclosure hearing if the motion was made by the defendant?

Answer 1

"Ans" probably stands for answer -- the responsive pleading where the defendant responds (answers) to the complaint.

Special defense might be what that jurisdiction calls an affirmative defense -- something the defendant raises that is a justification or excuse for their behavior -- medical necessity is one example.

Answer 2

It sound like the defendant or the debtor made motion to dismiss for a defect in the foreclosure process.