at (long) last
Finally. Typically said after a long period. My husband returns from his trip today at last—I've missed him so much! At long last, I got an A on a math test. All that studying really helped.
at long last
see under at last.
at long last
After a lengthy or troublesome wait or delay: At long last the winter was over.
at long last
Finally, after a long delay. The expression has been traced to the sixteenth century and was usually put as “at the long last,” last then being a noun meaning “duration.” Eric Partridge cited its perhaps most famous use, the opening words of the abdication speech of King Edward VIII in 1935, when he gave up the British throne in order to marry a divorced woman. By then it had long been a cliché.