Definition of "grue"

verb:
- To be frightened; to shudder with fear.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
noun:
- A shiver, a shudder.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
- Any byproduct of a gruesome event, i.e. gore, viscera, entrails, blood and guts.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
- A fictional predator that dwells in the dark.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
adjective:
- Of an object, green when first observed before a specified time or blue when first observed after that time.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
- Green or blue, as a translation from languages such as Welsh that do not distinguish between these hues.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License