以下这些形容词都含有"完全地或不完全地缺少光亮" 的意思
dark：最普通用词，指缺乏自然光线或人工照明，使某物漆黑无光或光线十分微弱。
dim：指光线不足或视力较差，不能清晰地看见物体。
black：侧重颜色是黑色的，有时也指无光的黑暗。
gloomy：指光线不足或部分光线受阻而出现的阴暗。
obscure：指因光线不充足而使物体灰暗不清，失去光泽或若隐若现。作借喻时指因复杂、深奥或含糊而难于理解。
vague：通常作借喻用，形容抽象事物。
grey与dark意思相近，但侧重阴暗单调的意味。
以下这些形容词均包含 "不明确的，模糊的" 的意思
vague：多指因语言不确切，太笼统或因构思含糊、不完善而造成模糊难解。
dim：侧重指或因光线暗淡，或因年代久远、身体欠佳等因素而产生视觉或察觉方面的困难。
indefinite：指无明确定义或限定，重点或总体轮廓不明确。
obscure：语气最强，指晦涩难懂。
ambiguous：指文章或讲话中，意思可能有多种理解，令人捉摸不定。
faint：指对某事物印象不深，或指声音微弱或希望的渺茫等。

词组

take a dim view of
regard with disapproval 不赞成

英语四级真题

If you tell your dim friend that he has the potential of an Einstein, you're just underlining his faults.
出自-2010年6月阅读原文
Most people believe that reading in dim light causes poor eyesight, but that is untrue.
出自-2011年6月听力原文

英语六级真题

A CFL cannot be simply installed in an incandescent fixture and then expected to produce a visual appearance that is more than washed out, foggy, and dim.
出自-2015年12月阅读原文
Her best hope in Germany was a government job—prospects for woman in the private sector were dim.
出自-2014年6月阅读原文
Why did Larry dim the lights and turn up the sound system before people entered the hall?
出自-2013年12月听力原文
Just before people began entering the hall, Larry dimmed the lights and turned up the sound system, which was playing soft music, hoping to create a warm personal atmosphere for the speech.
出自-2013年12月听力原文

柯林斯高阶英汉双解学习词典释义

ADJ-GRADED

(光线)昏暗的，暗淡的

Dim light is not bright.
例句
She stood waiting, in the dim light... 她站在昏暗的光线下等待。 Below decks, the lights were dim. 船舱里灯光昏暗。
ADJ-GRADED

(地方)昏暗的，阴暗的

A dim place is rather dark because there is not much light in it.
例句
The room was dim and cool and quiet. 房间里阴暗、清冷，静悄悄的。
ADJ-GRADED

(人影、物体)隐约的，蒙眬的，不分明的

A dim figure or object is not very easy to see, either because it is in shadow or darkness, or because it is far away.
例句
Pete's torch picked out the dim figures of Bob and Chang. 皮特的火把映出了鲍勃和张的模糊身影。
ADJ-GRADED

(记忆、理解)模糊的，依稀的，不清晰的

If you have a dim memory or understanding of something, it is difficult to remember or is unclear in your mind.
例句
It seems that the '60s era of social activism is all but a dim memory. 20 世纪 60 年代的社会激进主义似乎只是一个模糊的记忆。
ADJ-GRADED

(前景)灰暗的，渺茫的，不光明的

If the future of something is dim, you have no reason to feel hopeful or positive about it.
例句
The prospects for a peaceful solution are dim. 和平解决的希望非常渺茫。
ADJ-GRADED

(人)愚笨的，迟钝的

If you describe someone as dim, you think that they are stupid.
V-ERG

(使)（灯光）变昏暗;(使)变暗淡

If you dim a light or if it dims, it becomes less bright.
例句
Dim the lighting – it is unpleasant to lie with a bright light shining in your eyes... 把灯光调暗一些——躺着时眼前灯光太强很不舒服。 The houselights dimmed. 观众席的灯暗了下来。
VERB

将(汽车前灯)调为近光;使减光

If you are driving a car and dim the headlights, you operate a switch that makes them shine downwards, so that they do not shine directly into the eyes of other drivers.
例句
Dim your lights behind that car. 开到那辆车后面时将前灯调为近光。
V-ERG

(使)(前景、希望等)变渺茫;(使)（感情等）淡化

If your future, hopes, or emotions dim or if something dims them, they become less good or less strong.
例句
Their economic prospects have dimmed... 他们的经济前景变得很暗淡。 Forty eight years of marriage have not dimmed the passion between Bill and Helen. 48 年的婚姻生活并没消磨掉比尔和海伦之间的激情。
V-ERG

(使)(视力)变差；（使）看不分明

If your eyes dim or are dimmed by something, they become weaker or unable to see clearly.
例句
Her eyes dimmed with sorrow... 悲痛之下，她泪眼蒙眬。 The twinkle in his eyes was dimmed by tears. 他眼中闪烁的光芒被泪水模糊了。
V-ERG

(使)(记忆)变模糊;(使)变得不清晰

If your memories dim or if something dims them, they become less clear in your mind.
例句
Their memory of what happened has dimmed... 他们对所发生事情的记忆变得模糊了。 The intervening years had dimmed his memory. 经过了其间那么多年他的记忆已经不大清楚了。

英汉词典释义

adj.
暗淡的, 昏暗的, 不明亮的
He sat in a dim corner. 他坐在一个黑暗的角落里。 The light is too dim for me to read easily. 光线太暗, 我很难阅读。
隐约的, 模糊不清的
The outline of the mountain in the distance is dim. 远处山脉的轮廓隐隐约约。 Some people are rather dim about the purposes of their lives. 有些人稀里糊涂, 不知他们生活的目的是什么。
迟钝的；愚笨的；愚蠢的
看不清的；视力差的；模糊的
不光明的；不利的；糟糕的
脑子里模糊的；对感官不清楚的；(声音)微弱的，听不清的，不清楚的，不分明的，隐约的，朦胧的
(性质和特征上)不显著的，不明显的，缺乏生机的
(色彩)暗淡的，不鲜明的，不明亮的，无光泽的
[口语](前途)暗淡的，不可能发生(或成功)的，不可能实现的；不光明的，灰暗失色的；不利的；不容乐观的，悲观的，怀疑的
vt. & vi.
(使)变暗淡, (使)变模糊
The lights in the theatre began to dim. 剧场的灯光开始暗下来。 Tears dimmed her eyes. 眼泪使她的眼睛模糊。
（使）减弱，变淡漠，失去光泽

英英词典释义

Verb
1. switch (a car's headlights) from a higher to a lower beam
2. become or make darker;
"The screen darkend""He darkened the colors by adding brown"
3. become dim or lusterless;
"the lights dimmed and the curtain rose"
4. make dim or lusterless;
"Time had dimmed the silver"
5. make dim by comparison or conceal
6. become vague or indistinct;
"The distinction between the two theories blurred"
Adjective
1. lacking in light; not bright or harsh;
"a dim light beside the bed""subdued lights and soft music"
2. lacking clarity or distinctness;
"a dim figure in the distance""only a faint recollection""shadowy figures in the gloom""saw a vague outline of a building through the fog""a few wispy memories of childhood"
3. made dim or less bright;
"the dimmed houselights brought a hush of anticipation""dimmed headlights""we like dimmed lights when we have dinner"
4. offering little or no hope;
"the future looked black""prospects were bleak""Life in the Aran Islands has always been bleak and difficult"- J.M.Synge"took a dim view of things"
5. slow to learn or understand; lacking intellectual acuity;
"so dense he never understands anything I say to him""never met anyone quite so dim""although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray"dumb officials make some really dumb decisions""he was either normally stupid or being deliberately obtuse""worked with the slow students"

行业词典

医学： dimidius半，二分之一；

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