- Diagonial Di`a*go"ni*al, a.
Diagonal; diametrical; hence; diametrically opposed. [Obs.]
Sin can have no tenure by law at all, but is rather an eternal outlaw, and in hostility with law past all atonement; both diagonal contraries, as much allowing one another as day and night together in one hemisphere. --Milton. [1913 Webster]
The Collaborative International Dictionary of English. 2000.