Hap"pi*ness, n. [From Happy.] 1. Good luck; good fortune; prosperity.

All happiness bechance to thee in Milan!

2. An agreeable feeling or condition of the soul arising from good fortune or propitious happening of any kind; the possession of those circumstances or that state of being which is attended with enjoyment; the state of being happy; contentment; joyful satisfaction; felicity; blessedness.

3. Fortuitous elegance; unstudied grace; -- used especially of language.

Some beauties yet no precepts can declare,
For there's a happiness, as well as care.

Syn. -- Happiness, Felicity, Blessedness, Bliss. Happiness is generic, and is applied to almost every kind of enjoyment except that of the animal appetites; felicity is a more formal word, and is used more sparingly in the same general sense, but with elevated associations; blessedness is applied to the most refined enjoyment arising from the purest social, benevolent, and religious affections; bliss denotes still more exalted delight, and is applied more appropriately to the joy anticipated in heaven.

O happiness! our being's end and aim!

Others in virtue place felicity,
But virtue joined with riches and long life;
In corporal pleasures he, and careless ease.

His overthrow heaped happiness upon him;
For then, and not till then, he felt himself,
And found the blessedness of being little.

• joy, the emotion of being happy
  
• Good luck; good fortune; prosperity.
       All happiness bechance to thee in Milan! - w:William Shakespeare, Wikisource:The Two Gentlemen of Verona, I-i
  
• An agreeable feeling or condition of the soul arising from good fortune or propitious happening of any kind; the possession of those circumstances or that state of being which is attended enjoyment; the state of being happy; contentment; joyful satisfaction; felicity; blessedness
  
• Fortuitous elegance; unstudied grace; -- used especially of language.
        Some beauties yet no precepts can declare, For there's a happiness, as well as care. - w:Alexander Pope.