\ ˈfīn-ˈtünd \

Definition of fine-tuned

1 : precisely adjusted for the highest level of performance, efficiency, or effectiveness a fine-tuned machine His voice on "Always Late with Your Kisses" rolled along its cordillera of syllables like a fine-tuned sports car.— Bryan Di Salvatore
2 : improved or refined over time His story is that of a man with an exquisitely fine-tuned creative imagination …— Bruce McCall It is one of the many recipes that are treasured family hand-downs or the fine-tuned ideas of Marilyn Lewis …— Caroline Bates

First Known Use of fine-tuned

1926, in the meaning defined at sense 1

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The first known use of fine-tuned was in 1926

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