diagonal

1. 1.

   connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face

   “a diagonal line across the page”

   Similaroblique
2. 2.

   having an oblique or slanted direction

   Synonymsaslantaslopeslantedslantingslopedsloping

   Similarinclined

Other forms of diagonal

plural

diagonals·

Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.

Questions about diagonal

What does diagonal mean?

diagonal means "(geometry) a straight line connecting any two vertices of a polygon that are not adjacent". That is the primary sense; the word has 7 in total, listed in full on this page.

How many syllables are in diagonal?

diagonal has 4 syllables: di-ag-o-nal. The stress falls on "ag". In IPA it is /daɪˈæɡənəl/.

What is another word for diagonal?

Close synonyms include bias, solidus, slash, virgule, stroke. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is diagonal a common word?

diagonal is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.