twill

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A fabric with diagonal parallel ribs.
• noun The weave used to produce such a fabric.
• transitive verb To weave (cloth) so as to produce a pattern of diagonal parallel ribs.

from The Century Dictionary.

• noun A variety of textile fabric in which the weft-threads do not pass over and under the warp-threads in regular succession, as in common plain weaving. but pass over one and under two, over one and under three, or over one and under eight or ten, according to the kind of twill.
• noun The raised line made by twilling.
• noun A reed; a quill; a spool to wind yarn on.
• To quill; trim with quilling or fluting.
• The great fat pincushion lined with pink inside, and twilled like a lady's nightcap.
• A dialectal variant of till.
• To weave in a particular way (see twill, n.), producing diagonal ribs in the stuff.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To weave, as cloth, so as to produce the appearance of diagonal lines or ribs on the surface.
• noun 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.
• noun A fabric woven with a twill.
• noun A quill, or spool, for yarn.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a pattern created by the way threads are passed over and under each other during weaving
• noun a piece of cloth with this woven pattern

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a weave used to produce the effect of parallel diagonal ribs
• noun a cloth with parallel diagonal lines or ribs
• verb weave diagonal lines into (textiles)