To expand on the answer by Marco Ocram, who basically wrote that elementary particles tend to lump together, driven by the fundamental forces, to form atoms and molecules, I would suggest the meaning of live is to form more complex molecules and organisms.
If I look around, I observe that (solar) energy is used by single cell organisms to grow and multiply, and that eventually mutations appear in the form of multi-cellular organisms, tissues, organs, plants and animals. Evolution is a random process, but if you give it enough time, complex and very complex organisms will appear.
The original question probably aims at humans, and the purpose of a humal life. But to answer this question, we should also think about the purpose of animal life, including that of simple animals like slugs or insects. And what about that of plants and single cell live forms.
Let's discuss slugs. When it rains, I see a lot of slugs appear on sidewalks and bike paths, and it is hard to avoid stepping or riding over them. If I kill a slug, sometimes I think, what is the purpose of that life? The answer I came up with is that the slug eats "garbage": dead insects, dead leafs, other dead slugs, etc. The slug can eat practically anything. By eating the slug will convert "garbage" into nice proteins. Slugs, dead or alive, can be eaten by larger animals, such as birds, or moles. So when killing a slug by stepping on it, the life of that slug is not wasted but still has a lot of meaning, namely the proteins that it created by eating garbage during its lifetime, and after death, the chances it creates for larger animals.
We don't have to discuss much here about human evolution, which is well-known: Neanderthaler, Homo Sapiens, brain gets larger while jaw gets smaller. I would say that the evolution of technology is in a way the extension of human life: simple tools, powered tools, computers with transistors, integrated circuits of ever increasing complexity, cloud computing, a.i.
The weak point of my logic is that eventually, when our sun burns up, all of these life forms will get lost.
On the other hand, you see a similar tendency towards complexity in the universe. Consider interstellar gas clouds, that will lump together by gravity and form new stars. Stars will form galaxies. Interstellar gas clouds will also form carbon structures. The difference here is that it is more cyclical. When stars burn up, these will create gas clouds that can form new stars.
meaning-of-lifetag. Spoiler alert: there's no universal purpose. As for reproduction, nothing says you "should" find purpose in that (but if you do, then so be it). – NotThatGuy Oct 14 '23 at 03:41