The definition of a dragon is a mythical flying reptile creature that breaths smoke and fire, or a fierce person.(noun)
An example of a dragon is the creature Harry Potter had to fight in the first task of the Triwizard Tournament in the movie Harry Potter and the Goblet of Fire.
See dragon in Webster's New World College Dictionary
Origin: ME dragoun < OFr dragon < L draco < Gr drakōn, dragon, serpent, lit., the seeing one < derkesthai, to see < IE base *derk-, to see > OIr derc, eye
See dragon in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old French
Origin: , from Latin dracō, dracōn-, large serpent
Origin: , from Greek drakōn; see derk- in Indo-European roots.
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