We use word 'happy', 'hapiness', 'being happy', 'making others happy' and so on but what is happiness exactly. This is what Google answers :
|Synonyms:||glad - fortunate - joyful - lucky - merry - cheerful|
|''I do not have any big reservations but seeing my|
family smiling is what makes me most happy .''
And this is what oxford dictionary says:
Definition of happy