v. t. [ imp. & p. p. Twilled p. pr. & vb. n. Twilling. ] [ Scotch tweel; probably from LG. twillen to make double, from twi- two; akin to AS. twi-, E. twi- in twilight. See Twice, and cf. Tweed, Tweel. ] To weave, as cloth, so as to produce the appearance of diagonal lines or ribs on the surface. [ 1913 Webster ]

n. [ Scotch tweel. See Twill, v. t. ] 1. An appearance of diagonal lines or ribs produced in textile fabrics by causing the weft threads to pass over one and under two, or over one and under three or more, warp threads, instead of over one and under the next in regular succession, as in plain weaving. [ 1913 Webster ]

2. A fabric woven with a twill. [ 1913 Webster ]

3. [ Perhaps fr. quill. ] A quill, or spool, for yarn. [ 1913 Webster ]

n. [ Cf. Willy. ] A machine for cleansing or loosening wool by the action of a revolving cylinder covered with long iron spikes or teeth; a willy or willying machine; -- called also twilly devil, and devil. See Devil, n., 6, and Willy. Tomlinson. [ 1913 Webster ]