happiness

hap‧pi‧ness /ˈhæpinəs, ˈhæpinɪs/ BrE AmE noun [uncountable]
[Word Family: noun: ↑happiness ≠ ↑unhappiness; adverb: ↑happily ≠ ↑unhappily; adjective: ↑happy ≠ ↑unhappy]
the state of being happy:
Juliet’s eyes shone with happiness.
We want our children to have the best possible chance of happiness.

Oxford Advanced Learner's Dictionary

happiness

hap·pi·ness [happiness happinesses] [ˈhæpinəs] ; [ˈhæpinəs] noun uncountable

• to find true happiness

• Her eyes shone with happiness.

• Their grandchildren are a constant source of happiness.

Main entry: happy_derived

Cambridge Advanced Learner's Dictionary

happiness / ˈhæp.i.nəs / noun [ U ]

B1 the feeling of being happy:

It was only later in life that she found happiness and peace of mind.

formal Will you join me in wishing the bride and groom every happiness?

Merriam-Webster's Advanced Learner's Dictionary

happiness

hap·pi·ness /ˈhæpinəs/ noun, pl -ness·es
1 [noncount] : the state of being happy : joy
• They made a toast to long life and happiness.
• They found happiness together.
2 [count] somewhat formal : an experience that makes you happy
• I wish them every happiness. [=I hope that they will be very happy