Improvement

in good health after a period of illness or injury

Despite suffering from a serious flu, Maggie stayed on her feet and continued to work throughout the illness.

to have achieved great success or made great progress

I've come a long way since I started this job.

to become more and more successful with the passage of time

Over the years, their business has gone from strength to strength.

to be in a place or position where one needs to make a lot of progress in order to achieve a desired result

Despite working hard for months, the company had a long way to go to recover from the financial losses of the previous year.

to return to a position of success, influence or popularity after experiencing a decline or setback

Despite being out of the public eye for several years, the singer made a comeback with a new album that received critical acclaim and commercial success.

to make an effort to improve a situation after an unfortunate event or unexpected setback

After the breakup of their band, the musicians had to pick up the pieces and start new projects to continue pursuing their passion for music.

a very great success

The charity event was a roaring success, raising over a million dollars for their cause and bringing much needed attention and donors.

an unattractive or unsuccessful person or thing that later turns attractive or successful

As a child, Jane was awkward and shy, but in her teenage years she blossomed into a beautiful young woman - a true "ugly duckling" story.