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Definition of knuckleball

knuckleball

/ˈnʌk.əlˌbɔːl/
knuck · le · ball

Plural:knuckleballs
•
Past Simple:knuckleballed
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Past Participle:knuckleballed
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Present Participle:knuckleballing
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knuckleball Lexical Profile

knuckleball Game Scores & Validity

• noun

1

North American In baseball, a slow pitch thrown with the knuckles or fingertips dug into the ball so as to minimize spin, causing it to follow an erratic, unpredictable trajectory toward the batter.

Example

"The veteran pitcher relied on his signature knuckleball to baffle opposing hitters well into his forties."


2

In soccer and other ball sports, a shot or pass struck cleanly near the center of the ball so that it travels through the air with almost no spin and swerves unpredictably.

Example

"The midfielder struck a fierce knuckleball from thirty yards out that dipped sharply beneath the crossbar."

• verb

1

To move erratically through the air with little or no spin, or to throw or kick a ball in such a manner.

Example

"The free kick knuckleballed past the diving goalkeeper into the top corner of the net."

Word Origin & Etymology

Coined in early 20th-century American baseball from 'knuckle' and 'ball', referring to the early pitching technique of gripping the baseball with the knuckles rather than the fingertips to eliminate spin.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Knuckleball. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/knuckleball
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