Diagonal1. (a.) Joining two not adjacent angles of a quadrilateral or multilateral figure; running across from corner to corner; crossing at an angle with one of the sides.
2. (n.) A right line drawn from one angle to another not adjacent, of a figure of four or more sides, and dividing it into two parts.
3. (n.) A member, in a framed structure, running obliquely across a panel.
4. (n.) A diagonal cloth; a kind of cloth having diagonal stripes, ridges, or welts made in the weaving.
Thesaurus Entries
across, air line, athwart, axis, band, bar, beeline, bend, bendwise, bevel, beveled, bias, biased, biaswise, catercorner, catercornered, chord, cross-hatching, crossways, crosswise, dash, delineation, diameter, direct line, directrix, dotted line, edge, great-circle course, hachure, hairline, hatching, kittycorner, line, lineation, normal, oblique, oblique angle, oblique figure, oblique line, perpendicular, radius, radius vector, rhomboid, right line, score, scratch comma, secant, segment, separatrix, shortcut, side, slant, slanted, slanting, slash, solidus, straight, straight course, straight line, straight stretch, straightaway, streak, streaking, streamline, striation, strip, stripe, striping, stroke, sublineation, tangent, thwart, transversal, transverse, underline, underlining, underscore, underscoring, vector, virgule