Here's how Billionaire Facebook owner Mark Zuckerberg defines Happiness.

Forget the vacations and private getaways — for Facebook founder and CEO Mark Zuckerberg, happiness is all about helping others alongside the people he loves.

During a Q&A on Facebook last month, Zuckerberg answered a ton of questions and wrote a great deal about how people play a huge role in his life and work:

"To me, happiness is doing something meaningful that helps people and that I believe in with people I love."

"I think lots of people confuse happiness with fun. I don't believe it is possible to have fun every day. But I do believe it is possible to do something meaningful that helps people every day."

"As I've grown up, I've gained more appreciation for my close relationships — my wife, my partners at work, my close friends. Nobody builds something by themselves. Long term relationships are very important."

Considering Zuckerberg was a psychology major before he dropped out of Harvard, his marriage to college sweetheart Priscilla Chan, and his history of forgoing fancy cars, clothes, and a salary, his answer isn't all too surprising.

But it's a refreshing change of pace to hear such a down-to-earth response from a man running one of the most successful tech companies in the world and who has a personal net worth estimated at $35 billion, according to Wealth-X.

Credit: Business Insider