What does happiness mean?

It’s quite clear from a science perspective what happiness is because we can measure certain physiological metrics to postulate a definition.

Giving it a collective definition from a spiritual perspective is beyond human comprehension and can only be defined by the individual

What is The Meaning of Human Life?

Purpose.

What is Human Purpose?

A metaphysical condition difficult to articulate and produces a desired state of completion for the being and aligns the intangible ‘Self’ with a cause more significant than the existence of ‘The Self.’