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We found 16 dictionaries with English definitions that include the word knuckleball: Click on the first link on a line below to go directly to a page where "knuckleball" is defined. General (14 matching dictionaries) knuckleball: Collins English Dictionary [home, info] knuckleball: Vocabulary.com [home, info] knuckleball: Merriam-Webster's Online Dictionary, 11th Edition [home, info] knuckleball: Wordnik [home, info] knuckleball: Wiktionary [home, info] knuckleball: Dictionary.com [home, info] knuckleball: UltraLingua English Dictionary [home, info] Knuckleball: Wikipedia, the Free Encyclopedia [home, info] knuckleball: Rhymezone [home, info] knuckleball: Free Dictionary [home, info] knuckleball: Mnemonic Dictionary [home, info] knuckleball: WordNet 1.7 Vocabulary Helper [home, info] knuckleball: LookWAYup Translating Dictionary/Thesaurus [home, info] knuckleball: Dictionary/thesaurus [home, info] Slang (1 matching dictionary) Knuckleball: Urban Dictionary [home, info] Sports (1 matching dictionary) Knuckleball: Sports Definitions [home, info]

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