1. (n.)  A locked box in which one keeps one's ghosts safe from the world. Alternatively: a locked box in which one locks ghosts to keep the world safe from one's ghosts.
  2.  (adj.)  To be in a state of immunity or irrelevance to ghosts.  
  3. (prop. n.)   A failed and forgotten product consisting of an atomized ghost repellent which renders the subject ghostsafe  (def. 2)
  4. (slang, nonsense)  A phonetic anagram of Ghostface. 
  5. (prop. n.)  Elise Largesse and all related history, content, evidence