Thoughts...?

Happiness; how do you define this word?

Is it a feeling, a moment, a memory?  Is it aquired by doing more for others? And how do hope, faith, and peace fit into the equation? 
I have some opinions of my own, but I'm curious to hear what others have to say before I write about it.  I want so badly to feel MORE HAPPINESS and less sadness, fear, anxiety, and stress in my life. 
Please share with me your thoughts...