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]
(..) DUNCAN: My plenteous... (CHATTER AND LAUGHTER) Up! Up! (CHATTER DIES DOWN) My plenteous joys, wanton in fulness, seek to hide themselves in drops of sorrow. Sons, kinsmen, (..)2015 Macbeth