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

Usage examples of diagonal.

His most famous square was a kingsize brainteaser that did not sum correctly at the diagonals, unless the diagonals were bent like boomerangs.

He pointed out that there were other ways to reach the picnic place from above, but this diagonal path which ran behind the Cordova wall was quicker.

The Seventy-seventh Division is a one-story red brick building just off Broadway with diagonal curbside parking out front and a ten-foot chain-link fence around the sides and back.

From these draw lines to point of sight, then by their aid and the two diagonals proceed to construct the pentagon in the same way that we did the triangles and other figures.

The chief thing to be noted is the way in which the diagonals are produced beyond the square of the walls, to give the width of the eaves, according to their position.

Then by the diagonals and measurements on base draw the second step and the square inside it on which to stand the foot of the cross.

As she climbed she had to duck under cobwebs draped from the great dusty diagonals of the massive beams supporting the ceilings and the thick, white-plastered outer walls.

This time, without any warning, I drew back my arm and dealt her a cut right across the fleshiest part of her backside, but in a diagonal way, from right to left and giving the whip the slightest possible flick of my wrist as I concluded the stroke.

And began running on the diagonal, toward where the handcar would emerge toward the darkness ahead.

I could actually have managed it, as he was as strong as he was willful, his diagonal crossing of the flight of hurdles harvested a barrage of curses from the other jockeys.

Ulnar loops in any finger are designated by a diagonal line slanting in the direction of the loop.

The transformations defining the symmetry of a square are: all rotations that are multiples of 90 degrees, and all reflections about diagonals and about lines that join the midpoints of opposite sides.

We define a diagonal as a line drawn between nonadjacent angles in a regular plane polygon.

In one was a necktie with narrow diagonal stripes in varying shades of green, in the other was a platinum scarfpin in the shape of a crescent set with small diamonds.

His sarong, a skirtlike garment that men kilted up between their legs, was patterned in black and white diagonal stripes.