Added 10 October 2026 diagonalwise adjective adjective ! Definition from Wiktionary (CC BY-SA). More about diagonalwise at Wordnik → Where our words come from → In a diagonal fashion. adverb In a diagonal fashion. Origin From diagonal + -wise. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: stripwiseslaunchwisestripewisewidthwisecross-wiselengthwaysdeckwiserowwiserow-wisedimensionwisecirclewiselengthwise Back to today's word