Meanings
How to pronounce "on one's feet":
AU
While standing up or walking, running, etc.
Example: "He's very quick on his feet."
Example: "She's so light on her feet that we couldn't hear her coming."
Able to stand; hence, healthy, well, especially after some previous illness.
Example: "Welcome back! It's good to see you back on your feet."
In a satisfactory (non-physical) condition; happy financially, emotionally, etc.
Example: "The organization provides training and assistance to help the unemployed get back on their feet."
Example: "It took some time for the lady to get back on her feet after the death of her husband."
Used other than figuratively or idiomatically: see on, feet.