“We are here on Earth to do good to others. What the others are here for, I don't know.”
- W. H. Auden
If you look up the definition of a word, you'll find it references other words. Meaning is an oddly circular notion.
So what is it that gives a life meaning? I suppose that it, too, is an oddly circular notion. Our lives have meaning when they connect with other lives. We're unlikley to discover the meaning of our lives with a deep dive into our navels.