When you describe something as newly happening, it just occurred. A newly hatched chick is barely out of it shell, and a newly arrived classmate just joined your class recently.
If you just bought your enormous TV yesterday, you can call it newly acquired, and if your favorite movie finally came out on DVD this weekend, it's newly released. Doing something over again — or as if for the first time — can also be described this way, like when your newly single uncle goes on a blind date. Newly comes from new, with its Old English root neowe, "new, fresh, or recent."