ill-defined

形容词 ill-defined:

1. poorly stated or described
   同义词：unclear

ill-de.fined

adj.（形容词）
Not defined clearly or distinctly:
不分明的：定义不清楚或不确切的：
例句：
an ill-defined concept; an ill-defined view across the foggy moor.
一个定义不明的概念；沼泽对面大雾弥漫的模糊景观