refine
verb(re-fine)
make more complex, intricate, or richer
Examples:
Refine a design or pattern. 
refine
verb(re-fine)
reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities
Examples:
Refine sugar. 
refine
verb(re-fine)
improve or perfect by pruning or polishing
Examples:
Refine one's style of writing. 
refine
verb(re-fine)
attenuate or reduce in vigor, strength, or intensity by polishing or purifying
Examples:
Many valuable nutrients are refined out of the foods in our modern diet. 
refine
verb(re-fine)
make more precise or increase the discriminatory powers of
Examples:
Refine a method of analysis. 
Refine the constant in the equation. 
refine
verb(re-fine)
treat or prepare so as to put in a usable condition
Examples:
Refine paper stock. 
Refine pig iron. 
Refine oil.