What is the meaning of dragon?

noun

• A creature of Teutonic mythology; usually represented as breathing fire and having a reptilian body and sometimes wings.
  • synonyms: firedrake
• A fiercely vigilant and unpleasant woman.
  • synonyms: tartar
• A faint constellation twisting around the north celestial pole and lying between Ursa Major and Cepheus.
  • synonyms: Draco
• Any of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the body.
  • synonyms: flying dragon, flying lizard