A thin, sharp edge like that of a feather; in carpentry, a board that tapers to a thin or extremely sharp edge.
Compound of 'feather' and 'edge,' named for the resemblance to a feather's sharp outline. Used in specialized carpentry and engineering terminology since the 17th century.
In woodworking, a featheredge describes a board that's been planed down so it gets thinner and thinner until it's nearly as sharp as a feather—it's both beautiful and structurally useful because it creates a nearly invisible seam.
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