graveyard

1. (figuratively, by extension) A final storage place for collections of things that are no longer useful or useable.Examples: "Certain cards place other cards here because such cards might have abilities deemed too strong if they sent them to the graveyard instead."; "If you want to be tricky, though, Rapid Decay can be a flying elbow drop out of nowhere for a surprise win against graveyard manipulation decks; they will always see a Beetles coming, remember."; "When a player does discard or use a card or when a creature also died or a spell gets destroyed, that card gets placed into the player's graveyard."broadlyfiguratively

2. (figuratively, by extension) A final storage place for collections of things that are no longer useful or useable.broadlyfiguratively

3. (attributively) A period very early in the morning in which there is very little activity.Examples: "graveyard shift, graveyard slot, graveyard watch"; "Her husband, of course, came dressed as Herman Melville.) She's a veteran of these marathons, and warned me about the forthcoming graveyard stretch—when Moby-Dick melds with the altered brain chemistry of sleep deprivation."attributive

4. (US, slang) Synonym of suicide (“beverage combining all available flavors at a soda fountain”).Synonyms: suicideUSslang