Definitions:

1. a straight line connecting any two vertices of a polygon that are not adjacent noun
   • The child ran in a direct diagonal between the corners of the street, giving everyone a mild shock of panic.
2. an oblique line of squares of the same color on a checkerboard noun
   • the bishop moves on the diagonals
3. connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face adjective
   • a diagonal line across the page

Synonyms:

• aslant
• bias
• stroke

NearBy Words:

• diagonalisation
• diagonalise
• diagonalizable
• diagonalization
• diagonalize
• diagonally