Pronunciation: (fīn'tOOn', -tyOOn'),[key] —v.t.,-tuned, -tun•ing. 1. to tune (a radio or television receiver) to produce the optimum reception for the desired station or channel by adjusting a control knob or bar.
2. tune (def. 16).
3. to make minor adjustments in so as to produce stability, improvement, or the precise results desired: to fine-tune the nation's economy.