1. Improve or perfect by pruning or polishing
   - polish, refine, down 
2. Adjust finely
   "fine-tune the engine"
   - tweak 
3. Make fine adjustments or divide into marked intervals for optimal measuring
   - calibrate, graduate

Derived forms: fine-tuned, fine-tunes, fine-tuning

Type of: adjust, ameliorate, amend, better, correct, improve, meliorate, set, tune, tune up

• unexampled
• unexceeded
• unexcelled
• unexceptionable
• unexceptionably
• unexceptional
• unexchangeability
• unexchangeable
• unexcitable
• unexcited
• unexciting
• unexcitingly
• unexclusive
• unexcused
• unexhausted
• unexpansive
• unexpected
• unexpectedly
• unexpectedness
• unexpendable
• unexpended
• unexpired
• unexplainable
• unexplained
• unexploded