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tombstone (EN)
substantiv

substantiv “tombstone”

singular tombstone, plural tombstones
  1. gravsten
    The old cemetery was filled with tombstones, each bearing the name and dates of the person buried beneath.
  2. avser symbolen "∎", som används för att ange slutet på ett bevis i matematik.
    After carefully laying out each step of the theorem, the mathematician concluded the proof with a tombstone, signaling to readers that no further explanation was needed.