Serendipity. It is “the occurrence and development of events by chance in a happy or beneficial way.” So, a happy coincidence, as I’ve heard it described. For me, it always had a little more meaning to it. Perhaps it was the complexity of the word when I first heard it, but it always felt like more than just a coincidence. More like a “meaningful connection.”
My full misunderstanding of a word aside, I always applied serendipity to hearing a song for the first time and catching that meaningful lyric, or the emotion of a melody, that spoke to you in that very moment. That meshed with exactly what you were feeling or experiencing. It’s happened to me a couple of times. I’m sure it has for many others as well. The connection was so strong I felt compelled to buy the CD (back when they still had CDs), if anything, to reward the artist(s) for creating the perfect song, in the perfect moment (at least from my perspective).