Noah Webster's 1828 American Dictionary of the English Language is regarded by many as the finest English
dictionary ever published. The dictionary is available in many forms. I made the content available here for my own purposes,
out of personal admiration for this particular dictionary.
AB'ATIS, Rubbish. In fortification, piles of trees, or branches of trees sharpened, and laid with the points outward, in front of ramparts, to prevent assailants from mounting the walls.