[ fahyn-toon, -tyoon ]
/ ˈfaɪnˈtun, -ˈtyun /
verb (used with object), fine-tuned, fine-tun·ing.
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Origin of fine-tune
First recorded in 1920–25
Related formsfine-tun·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for fine tune
(tr) to make fine adjustments to (something) in order to obtain optimum performance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012