fine-tune
1. [ verb ] adjust finely
Synonyms: tweak
Examples:

"fine-tune the engine"

Related terms: tune
2. [ verb ] improve or perfect by pruning or polishing
Synonyms: polish refine down
Examples:

"refine one's style of writing"

Related terms: better educate
3. [ verb ] improve or perfect by pruning or polishing
Synonyms: refine burnish down polish gloss
Examples:

"refine one's style of writing"

Related terms: better decorate educate over-refine gloss_over whitewash polish rub
4. [ verb ] make fine adjustments or divide into marked intervals for optimal measuring
Synonyms: calibrate graduate
Examples:

"calibrate an instrument" "graduate a cylinder"

Related terms: adjust graduation