At Last Meaning

(idiomatic) In the end; finally; ultimately.

Example:   Now that the dog has stopped barking, perhaps we can at last get some rest.‎ â€” After three hundred years had passed, at last the vampire's soul was free.‎
L'Estrange
  Upon balancing the account, the profit at last will hardly countervail the inconveniences that go along with it.
1898, Winston Churchill, chapter 4, The Celebrity:
  No matter how early I came down, I would find him on the veranda, smoking cigarettes, or […] . And at last I began to realize in my harassed soul that all elusion was futile, and to take such holidays as I could get, when he was off with a girl, in a spirit of thankfulness.
1913, Joseph C. Lincoln, chapter 6, Mr. Pratt's Patients:
  She was so mad she wouldn't speak to me for quite a spell, but at last I coaxed her into going up to Miss Emmeline's room and fetching down a tintype of the missing Deacon man.
  After all their troubles, at last they lived happily ever after.‎ â€” After exhausting all possibilities, Holmes was at last satisfied the problem was unsolvable.‎