diagonal

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

(noun) a line or cut across a fabric that is not at right angles to a side of the fabric. Synonyms: bias.

(noun) an oblique line of squares of the same color on a checkerboard. Example: "The bishop moves on the diagonals."

(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.

(noun) a punctuation mark (/) used to separate related items of information. Synonyms: solidus, slash, virgule, stroke, separatrix.

(adj) connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face. Example: "A diagonal line across the page."

(adj) having an oblique or slanted direction. Synonyms: aslant, aslope, slanted, slanting, sloped, sloping.