n. A pitch thrown with the ball gripped on the fingertips and released with no rotation which travels over an unpredictable path to the plate due to micro-turbulence in the air.
n. An event that is hard to predict.
v. To pitch knuckleballs.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a baseball pitch thrown with little speed or spin
Word Usage
"League Championship Series, Wakefield's knuckleball is still dancing."