Definitions of joy:

• noun:   something or someone that provides pleasure; a source of happiness

  Example: "A joy to behold"

• noun:   the emotion of great happiness
• verb:   make glad or happy
• verb:   feel happiness or joy
• name:  A female given name (common: 1 in 1098 females; popularity rank in the U.S.: #230)
• name:  A surname (common: 1 in 20000 families; popularity rank in the U.S.: #2509)