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We found 7 dictionaries with English definitions that include the word knuckleballer: Click on the first link on a line below to go directly to a page where "knuckleballer" is defined. General (7 matching dictionaries) knuckleballer: Collins English Dictionary [home, info] knuckleballer: Merriam-Webster's Online Dictionary, 11th Edition [home, info] Knuckleballer, knuckleballer: Wordnik [home, info] knuckleballer: Infoplease Dictionary [home, info] knuckleballer: Dictionary.com [home, info] Knuckleballer: Wikipedia, the Free Encyclopedia [home, info] knuckleballer: Dictionary/thesaurus [home, info] (Note: See knuckleball for more definitions.)

Quick definitions from WordNet (knuckleball) ▸ noun:  a baseball pitch thrown with little speed or spin ▸ Also see knuckleball