|1.||[ adjective ] (geometry) at an angle; especially 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.||[ noun ] (mathematics,geometry) a line or cut across a fabric that is not at right angles to a side|
|3.||[ adjective ] having an oblique or slanted direction|
|Synonyms:||slanting sloping slanted sloped aslope aslant|
|4.||[ noun ] an oblique line of squares of the same color on a checkerboard|
"the bishop moves on the diagonals"
|Related terms:||line line main_diagonal secondary_diagonal chessboard|
|5.||[ noun ] (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|
|Related terms:||set square_matrix mathematics diagonalize|
|6.||[ noun ] (geometry) a straight line connecting any two vertices of a polygon that are not adjacent|
|Related terms:||straight_line geometry|
|7.||[ noun ] a punctuation mark (/) used to separate related items of information|
|Synonyms:||slash virgule stroke separatrix solidus|