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1.
Hands with long and particularly strong fingers, the result of years piano practice.
I couldn't pry that cookie away from her once she got hold of it with those piano hands.
by Uncle_Doug June 02, 2006
 
2.
The abnormally large hands of a musician, typically one who plays the piano. Can also pertain to the hands of a musician who plays an instrument requiring a wide physical reach such as guitar or bass. Note: hands must be freakishly huge and may only be called piano hands if the specimen is musically inclined. That's right, we know who you are, impostors. . .
Derek: How is it even possible that you can pick up that watermelon with one hand?

Dave: Piano hands, dude. Piano hands. . .
by Pi@noguy January 08, 2011
 
3.
hands with features of those who have played piano for a long time.

usually characteristics of long skinny fingers, hands look delicate and womanly.

usually seen on nerdy asian guys. a definite turnoff for girls.
"Oh my god. Did you see the guy in the first row? Ewwww... he has piano hands."
by pinkxbubboo February 11, 2008