1. cemeteries or graveyards
Usage: informal
2. places where old or discarded vehicles, aircraft, or machinery are stored or abandoned
Usage: informal

Examples

• The old boneyards on the hill date back to the 1800s.
• Many historic boneyards contain elaborate Victorian monuments.
• The aircraft boneyard in Arizona stores thousands of retired military planes.
• Car boneyards are good places to find spare parts for vintage automobiles.
• The ship boneyard contained dozens of decommissioned naval vessels.
• Urban explorers often photograph abandoned train boneyards.
• The military maintains several boneyards for obsolete equipment.