- connecting two nonadjacent angles or vertices of a polygon or polyhedron, as a straight line.
- extending from one edge of a solid figure to an opposite edge, as a plane.
Origin of diagonal
OTHER WORDS FROM diagonaldi·ag·o·nal·ly, adverbnon·di·ag·o·nal, adjective, nounnon·di·ag·o·nal·ly, adverb
How to use diagonal in a sentence
The diagonal-thinking capability that balances short-term necessity with longer-term opportunity.With many employees wary, company leaders prepare their return-to-office coronavirus vaccine policies|Jessica Davies|January 18, 2021|Digiday
These pairs are spaced apart so the grid looks like a checkerboard, with diagonals crossing every other square.
The skeleton of the Venus’ flower basket, however, has pairs of diagonals running in both directions rather than the single diagonals crisscrossing a typical truss.
In so doing, it drops below the diagonal line, one of the only counties to do so.Texas has managed the near-impossible: Its presidential election lawsuit just got worse|Philip Bump|December 11, 2020|Washington Post
It reduces the turning radius of the vehicle, which is handy in everyday situations, but it also allows the truck to drive on a sideways diagonal path, like a crab.The 2022 GMC electric Hummer looks a lot different than you might expect|Stan Horaczek|October 21, 2020|Popular-Science
I was waiting for something to happen and it was like an explosion, everything shot diagonally left across the track.Prince Harry at Silverstone Grand Prix To See Lewis Hamilton Win|Tom Sykes|July 7, 2014|DAILY BEAST
We accidentally put a highway to nowhere cutting diagonally across our island.SimCity Is Smarter Than You (Even If You’re an Urban Planner)|Josh Dzieza|February 26, 2013|DAILY BEAST
Dressed in a black suit, Roubini was seated diagonally across from Osborne at a table in the corner of the room.
Three model train tracks run diagonally across the broken glass.
Panels may be woven either length-wise (step 8), crosswise (step 8), diagonally across the mat (step 4), or in zigzags (step 3).Philippine Mats|Hugo H. Miller
I secured a used broom, the longer and newer the better, and cut the straws off diagonally across the sweeping edge.The Boy Mechanic, Book 2|Various
The cloud passed across the straits diagonally to the south-west.Left on Labrador|Charles Asbury Stephens
The last half-league of the way is very steep, and leads to the ridge of a chain of hillocks running diagonally across the valley.
Following the direction of his eyes, Whiteside saw two deep furrows running diagonally across the grip.The Daffodil Mystery|Edgar Wallace