Adjacent Words

Diagonal definitions

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Webster's 1828 Dictionary

DIAGONAL, a. [Gr. A corner.]
1. In geometry, extending from one angle to another of a quadrilateral figure, and dividing it into two equal parts.
2. Being in an angular direction.
DIAGONAL, n. A right line drawn from angle to angle of a quadrilateral figure, as a square or parallelogram, and dividing it into two equal parts. It is sometimes called the diameter, and sometimes the diametral.

WordNet (r) 3.0 (2005)

adj
1: connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face; "a diagonal line across the page"
2: having an oblique or slanted direction [syn: aslant, aslope, diagonal, slanted, slanting, sloped, sloping] n
1: (geometry) a straight line connecting any two vertices of a polygon that are not adjacent
2: a line or cut across a fabric that is not at right angles to a side of the fabric [syn: diagonal, bias]
3: an oblique line of squares of the same color on a checkerboard; "the bishop moves on the diagonals"
4: (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry
5: a punctuation mark (/) used to separate related items of information [syn: solidus, slash, virgule, diagonal, stroke, separatrix]

Merriam Webster's

I. adjective Etymology: Latin diagonalis, from Greek diag?nios from angle to angle, from dia- + g?nia angle; akin to Greek gony knee — more at knee Date: 1563 1. a. joining two vertices of a rectilinear figure that are nonadjacent or two vertices of a polyhedral figure that are not in the same face b. passing through two nonadjacent edges of a polyhedron <a diagonal plane> 2. a. inclined obliquely from a reference line (as the vertical) <wood with a diagonal grain> b. having diagonal markings or parts <a diagonal weave> II. noun Date: 1571 1. a diagonal straight line or plane 2. a. (1) a diagonal direction (2) a diagonal row, arrangement, or pattern b. something oriented in diagonal position 3. slash 4

Oxford Reference Dictionary

adj. & n. --adj. 1 crossing a straight-sided figure from corner to corner. 2 slanting, oblique. --n. a straight line joining two non-adjacent corners. Derivatives: diagonally adv. Etymology: L diagonalis f. Gk diagonios (as DIA-, gonia angle)

Webster's 1913 Dictionary

Diagonal Di*ag"o*nal, a. [L. diagonalis, fr. Gr. ? from to angle; dia` through + ? an angle; perh. akin to E. knee: cf. F. diagonal.] (Geom.) 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. Diagonal bond (Masonry), herringbone work. See Herringbone, a. Diagonal built (Shipbuilding), built by forming the outer skin of two layers of planking, making angles of about 45[deg] with the keel, in opposite directions. Diagonal cleavage. See under Cleavage. Diagonal molding (Arch.), a chevron or zigzag molding. Diagonal rib. (Arch.) See Cross-springer. Diagonal scale, a scale which consists of a set of parallel lines, with other lines crossing them obliquely, so that their intersections furnish smaller subdivisions of the unit of measure than could be conveniently marked on a plain scale. Diagonal stratification. (Geol.) Same as Cross bedding, under Cross, a.

Webster's 1913 Dictionary

Diagonal Di*ag"o*nal, n. 1. 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. 2. (Engin.) A member, in a framed structure, running obliquely across a panel. 3. A diagonal cloth; a kind of cloth having diagonal stripes, ridges, or welts made in the weaving.

Collin's Cobuild Dictionary

(diagonals) 1. A diagonal line or movement goes in a sloping direction, for example, from one corner of a square across to the opposite corner. ...a pattern of diagonal lines. ADJ: usu ADJ n • diagonally Vaulting the stile, he headed diagonally across the paddock... ADV: ADV with v, oft ADV prep 2. A diagonal is a line that goes in a sloping direction. The bed linen is patterned in stylish checks, stripes, diagonals and triangles. N-COUNT 3. In geometry, a diagonal is a straight line that joins two opposite corners in a flat four-sided shape such as a square. Mark five points an equal distance apart along the diagonals. N-COUNT

Moby Thesaurus

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