WordNet 3.0
Verb (3)
- improve or perfect by pruning or polishing“refine one's style of writing”Synonyms: polishrefinedown
- adjust finely“fine-tune the engine”Synonyms: tweak
- make fine adjustments or divide into marked intervals for optimal measuring“calibrate an instrument”“graduate a cylinder”Synonyms: calibrategraduate
Webster's Dictionary (GCIDE)
fine-tune \fine-tune\ v. t. to adjust carefully and precisely so as to achieve optimum performance or efficiency; as, The mechanic fine-tuned the engine. [WordNet 1.5]