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n. A wooden pin stuck on the sides of a bedstead, to prevent the bedclothes from slipping on either side.

n. “A wooden pin stuck anciently on the sides of the bedstead, to hold the clothes from slipping on either side.”

n. A staff or stick formerly used in some way about a bed, and frequently serving as a weapon, in which sense the word most commonly occurs. Specifically—

n. [Used in the colloquial phrase in the twinkling of a bed-staff, in which, when bedstaff became obsolete, bedpost was substituted, depriving the phrase of its literal force in modern use.

"And at that I told him, not seeing how I could keep it back, the matter of my former affidavit and of the bedstaff in the dispensing-room, and said that a house where such things happened was no place for me."