What is the meaning of Wyrm?

A huge limbless and wingless dragon or dragon-like creature.

A sea serpent.

Alternative form of worm

any crawling animal, especially:

  1. worm
  2. maggot, grub
  3. reptile, especially a snake
  4. dragon

worm

maggot, grub

reptile, especially a snake

dragon

Source: wiktionary.org