01 n. Hewn or squared stone; also, masonry made of squared or hewn stone.
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1.
Hewn or squared stone; also, masonry made of squared or hewn stone.(Masonry)“Rough ashlar, a block of freestone as brought from the quarry. When hammer-dressed it is known as common ashlar.” — Knight.
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2.
In the United States especially, a thin facing of squared and dressed stone upon a wall of rubble or brick.