Refers specifically to the Western mythological creature, often winged and fire-breathing, distinct from the East Asian 竜/龍.
See also: 竜
A large dragon appears in that game.
西洋のドラゴンは火を吹くと言われている。
Western dragons are said to breathe fire.
The hero finally slew the dragon.
The story's protagonist flew through the sky riding a dragon.