Ca·ter-cor·nered a.  Diagonal. [Colloq.]
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  cater-cornered
       adj : slanted across a polygon on a diagonal line; "set off in a
             catty-corner direction across the vacant lot" [syn: catacorner,
              cata-cornered, catercorner, catty-corner, catty-cornered,
              kitty-corner, kitty-cornered]