Definition of "witch-grass" [witch-grass]

• Same as oldwitch grass. (noun)
• The quitch-grass or couchgrass, Agropyrum repens. (noun)

The Century Dictionary (Public Domain)

• "The wall of weathered stone stood about shoulder height, and the floor which was covered with a carpet of moss and witch-grass was no more than a dozen paces across."
• "One woman, it is true, had succeeded in raising a few worms on witch-grass; but they had not prospered, the silk from their cocoons proving poor."
• "Even witch-grass, the bane of the farmer, has its rewarding side, when one really does get out its handful of wicked-looking, crawly, white tubers."