用法:
1 not accurately described 不清楚的; 含混的; 不分明的; 不明确的:
an ,ill-defined `job 内容不明确的工作.

用法:
2 not distinct in outline 轮廓不鲜明的:
an ill-defined lump of rock on the horizon 天边一处轮廓不清的岩影.

• defoliator
• deforestation
• deform
• defraud
• defray
• deft
• defunct
• defuse
• defy
• degenerate
• degrade
• dehumanize
• dehydrate
• dehydration
• deice
• deification
• deify
• deign
• deity
• dejected
• dejection
• delectable
• delectation
• delegate
• delete