(verb)
to refine or improve the condition or state of something, for example to make someone's manners smoother;
e.g. The speaking coach helped the actor polish her accent for the role.
(verb)
to add the finishing touches to something and being it to a more refined or developed state;
e.g. I can use this feedback to polish my article by the deadline.
(noun)
a substance that is rubbed onto something to make it look smooth, glossy, and shiny;
e.g. She added polish to his shoes to make them look as good as new.
(noun)
the action or process of rubbing something to make it look smooth and shiny/glossy, or the smooth and shiny/glossy appearance thus achieved;
e.g. He gave the mirror a quick polish to remove the fingerprints.
(noun)
a state of elegance, refinement, or high development in something/someone;
e.g. They admired the polish and effectiveness of her speech.