1、diagonal的词典解释是：斜的;对角的Adiagonal line or movement goes in a sloping direction, for example, from one corner of a square across to the opposite corner。2、diagonal的意思是adj.对角线的；斜的；斜纹的；n.对角线；斜线；斜列。3、diagonal【近义词】sloping倾斜的。