Only meaning of life is that thanks to gravity, matter crashes itno other matter forming more complex systems like stars, planets, and organic molecules. Over billions of years, every so often organic molecules become living things like human beings, whales, and koala bears. But life existing ultimately is no more remarkable or significant or meaningful than stars and planets existing. Because they can exist, they do exist. It's just the human brain and ego that makes a simple process and statistical probability into something spiritually significant.
When our star enters its red giant phase in 3 or 4 billion years and expands incinerating the Earth, all questions of how meaningful life is will be answered - it isn't. Of course, a big rock like Apophis could take us out in 2029 and answer things much sooner.