boneyard

Short definition from Wiktionary

Noun

1. 1
   A graveyard.
2. 2
   In the game of dominoes, the pile of upside-down pieces that have yet to be used.
3. 3
   A dumpsite for obsolete or unusable aircraft etc; a junkyard.
4. 4
   An area scraped down to the mineral soil, so that smouldering material can be placed there without starting another fire.