Definitions of happy:

• adjective:   experiencing pleasure or joy

  Example: "Happy you are here"

• adjective:   satisfied; enjoying well-being and contentment

  Example: "Quite happy to let things go on as they are"

• adjective:   well expressed and to the point

  Example: "A happy turn of phrase"

• adjective:   enjoying or showing or marked by joy or pleasure or good fortune

  Example: "A happy smile"

• adjective:   exaggerated feeling of well-being or elation
• adjective:   marked by good fortune

  Example: "A happy outcome"