diagonal

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

having an oblique or slanted direction

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

an oblique line of squares of the same color on a checkerboard

“the bishop moves on the diagonals”

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”

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

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