diagonal Meaning and Definition

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

2. n. (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

3. n. an oblique line of squares of the same color on a checkerboard

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

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

6. s. having an oblique or slanted direction

7. s. 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