spellathon in English dictionary spellathon Meanings and definitions of "spellathon" (chiefly Australian, New Zealand) A spelling bee held to raise money for charity. noun (chiefly Australia, New Zealand) A spelling bee held to raise money for charity. more Grammar and declension of spellathon spellathon ( plural spellathons) spellathon (plural spellathons) more Sample sentences with "spellathon" Declension Stem Try again Authors