She answered the phone and, to her great 'joy', heard her son's voice on the line. [=she felt very happy when she heard her son's voice]
“You've spent hours looking for it. Any 'joy'? [='luck']” “No 'joy' whatsoever, I'm afraid. I can't find it.”
They were 'shouting/jumping for joy'. [=they shouted/jumped because they were very happy]
(..) Thank God. You must leave now. I promise to send for you if she asks for you. I don't know what happened to me. I forgive you. I forgive Anna. My soul is filled with joy. I will remain with her and look after her forever. Come now. Come now. Look at you. (..)2012 Anna Karenina