It is not easy to define happiness. Here are some definitions of happy: The research suggests that happiness is a combination of how satisfied you are with your life (for example, finding meaning in your work) and how good you feel on a day-to-day basis.
According to Merriam-Webster’s Online Dictionary, here is the definition of happiness:
It captures the fleeting positive emotions that come with happiness, along with a deeper sense of meaning and purpose in life—and suggests how these emotions and sense of meaning reinforce one another.
PERMA are happiness theories born out of positive psychology that incorporate elements such as: positive emotion, engagement, positive relationships, meaning, and accomplishment.
Happiness is when your life fulfills your needs.