Definition of "undrawn"

With my back to the main-mast, I parried the first blow with my undrawn weapon. The blade of the second was lifted to strike me, when his comrade perceived my defensive state, and struck it aside.

1808, Charles Lucas, The Abissinian Reformer; Or, The Bible and Sabre: A Novel

This communication between the tank and pump is controlled by a float valve in the tanks and a cock in the pipe, while a poppet valve prevents the undrawn liquor going into the waste tank.

1900, Patents for Inventions: Abridgments of Specifications, page 75

Here the curtains were undrawn and they could see the lights twinkling out in the windows of the other houses.

1923, Elizabeth Bowen, “The Shadowy Third”, in Encounters, page 153

The point of these distinctions is that the imagining of disease has much in common with imagining pictures, especially undrawn pictures in the mind.

2003, G. Rousseau, M. Gill, D. Haycock, Framing and Imagining Disease in Cultural History, page 6