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]
(..) It's a fertility study. Joey, please tell me you're only donating your time. Actually, a little more than that. Thank you, God. This will bring us so much joy. Come on, it's not that big a deal. I just go down there every other day... ...and make my contribution to the project. (..)1995 TvShow: Friends Title: The One Where Rachel Finds Out Season: 1 Episode 24