blanket stitch

a kind of buttonhole stitch with the stitches spaced relatively far apart, used to reinforce the edge of thick material, as that used for blankets

See blanket stitch in American Heritage Dictionary 4

noun
A buttonhole stitch used for edging around heavy material.

transitive verb blan·ket-stitched, blan·ket-stitch·ing, blan·ket-stitch·es
To sew with a buttonhole stitch.
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