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]
(..) and she was-- You know, she could barely move. And she communicated, I think, through... I'm not sure if it was through blinking. You see just in her eyes... ...the joy that she had being on set on It's actually very hard to sort of work on things when you know-- You think, (..)2012 The Hobbit: An Unexpected Journey