DIAGONAL
\da͡ɪˈaɡənə͡l], \daɪˈaɡənəl], \d_aɪ__ˈa_ɡ_ə_n_əl]\
Definitions of DIAGONAL
 2006  WordNet 3.0
 2011  English Dictionary Database
 2010  New Age Dictionary Database
 1913  Webster's Revised Unabridged Dictionary
 1919  The Winston Simplified Dictionary
 1899  The american dictionary of the english language.
 1919  The Concise Standard Dictionary of the English Language
 1894  The Clarendon dictionary
 1914  Nuttall's Standard dictionary of the English language
 1874  Etymological and pronouncing dictionary of the English language
 1871  The Cabinet Dictionary of the English Language
 1790  A Complete Dictionary of the English Language
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a punctuation mark (/) used to separate related items of information

(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

an oblique line of squares of the same color on a checkerboard; "the bishop moves on the diagonals"

(geometry) a straight line connecting any two vertices of a polygon that are not adjacent

a line or cut across a fabric that is not at right angles to a side of the fabric
By Princeton University

a punctuation mark (/) used to separate related items of information

(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

an oblique line of squares of the same color on a checkerboard; "the bishop moves on the diagonals"

(geometry) a straight line connecting any two vertices of a polygon that are not adjacent
By DataStellar Co., Ltd

Diagonally.

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.

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.

A member, in a framed structure, running obliquely across a panel.
By Oddity Software

Diagonally.

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.

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.

A member, in a framed structure, running obliquely across a panel.
By Noah Webster.

Diagonally.

Extending from one angle to another.

A straight oblique line dividing a rectangular figure into equal parts.
By William Dodge Lewis, Edgar Arthur Singer

Diagonally.

Through the corners, or from angle to an opposite angle of a four or many sided figure.

A straight line so drawn.
By Daniel Lyons

Diagonally.

A straight line or plane passing from one angle, as of a square, to any other angle not adjacent.
By James Champlin Fernald
By William Hand Browne, Samuel Stehman Haldeman

Extending from one angle to an opposite of a quadrilateral or multilateral figure, and dividing it into two.

Right line so drawn.
By Nuttall, P.Austin.

A straight line drawn from one angle to another opposite angle, and dividing the figure into two parts, as in a square.

Drawn from one corner or angle to another.
By Stormonth, James, Phelp, P. H.