The meaning of finally is after a prolonged time : How to use finally in a sentence. Finally adverb (last) b1 used especially at the beginning of a sentence to introduce the last point or idea:
At the final point or moment; See examples of finally used in a sentence. You use finally when you want to emphasize the amount of time it took.
Eventually they got to the hospital. I found victoria avenue eventually. When john finally arrived, he said he'd lost his way.
Lastly finally, i washed my dog. Finally, i'd like to thanks all the people who helped. Last in place, order, or time:[before a noun] final meeting of the season.
Definition of finally adverb in oxford advanced learner's dictionary.