boneyard

noun4

1. •
   (informal) A graveyard.
2. •
   (slang) A dumpsite for obsolete or unusable aircraft etc; a junkyard.

   • The “Boneyard” is a place of antiques and historic symbolism, a burial ground for aircraft. — 1999
3. •
   In the game of dominoes, the pile of upside-down pieces that have yet to be used.
4. •
   An area scraped down to the mineral soil, so that smouldering material can be placed there without starting another fire.