of a colour intermediate between green and violet, as of the sky or sea on a sunny day
蓝色的，天蓝的，蔚蓝的
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the clear blue sky 晴朗的蓝天
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blue jeans 蓝色牛仔裤
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deep blue eyes. 深蓝色的眼睛。
(of a person's skin)having or turning such a colour, especially as a result of cold or breathing difficulties
（因寒冷或呼吸困难而使皮肤呈）青紫色的，青灰的
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Ashley went blue and I panicked. 阿什利脸色发紫，我吓坏了。
(of a bird or other animal)having blue markings
（鸟等动物）有蓝色斑纹的
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a blue jay. 蓝色的松鸦。
(of a cat, fox, or rabbit)having fur of a smoky grey colour
（猫，狐狸，兔子）毛色青灰的
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the blue fox .青灰色的狐狸。
(of a ski run)of the second-lowest level of difficulty, as indicated by coloured markers positioned along it
（滑雪雪道）有蓝色条记的（指滑雪难度属次低级的）。
【物理】 （夸克颜色）蓝色的。
〈非正式〉 （人，情绪）悲伤的，沮丧的
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he's feeling blue .他感到悲伤。
〈非正式〉 （电影，笑话，故事）色情的，淫秽的
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a blue movie .色情电影。
〈英，非正式〉 （政治上）保守的，守旧的
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the successful blue candidate .成功的保守派候选人。
[mass noun]blue colour or pigment
蓝色，蓝颜料
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she was dressed in blue 她身着蓝色衣服
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the dark blue of his eyes 他眼睛的深蓝色
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[count noun]
armchairs in pastel blues and greens .淡蓝和淡绿相间的扶手椅。
blue clothes or material
蓝色服装，蓝色衣料
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Susan wore blue .苏珊穿着蓝色衣服。
a blue thing, in particular
蓝色物品，尤指：
a blue ball, piece, etc. in a game or sport
（比赛或体育运动中的）蓝色球；蓝色物件。
the blue ball in snooker
（斯诺克中的）蓝色球。
(
〈诗／ 文〉 天空；大海；未知世界
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far out upon the blue were many sails .大海远处有许多帆船。
another term for
同
[usu. with modifier]a small butterfly, the male of which is predominantly blue while the female is typically brown
蓝灰蝶。
(亦作
〈英〉 代表剑桥（或牛津）大学的运动员
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a flyweight boxing blue .剑桥（或牛津）大学校队次最轻量级拳击运动员。
a distinction awarded to such a person
剑桥（或牛津）大学校队运动员的荣誉
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a centre forward who won a rugby blue .获得剑桥（或牛津）大学橄榄球校队运动员荣誉的中锋。
〈澳/ 新西兰，非正式〉 争论；斗殴。[ORIGIN: 1940s: perhaps by association with phrases such as
〈澳／新西兰，非正式〉 错误，纰漏。
〈澳/ 新西兰，非正式〉 红头发者。[ORIGIN: 1930s: of unknown origin.]
(
（使）变成蓝色
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[with obj.]
the light dims, bluing the retina 光线暗下来，把视网膜变成蓝色
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[no obj.]
the day would haze, the air bluing with afternoon .天色总是朦朦胧胧，到下午天空才会变蓝。
[with obj.]heat (metal) so as to give it a greyish-blue finish
（通过烧制）给（金属）烤蓝，发蓝
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[as adj.
blued ]nickel-plated or blued hooks .镀镍或烤蓝的鱼钩。
[with obj.]
〈主史〉 用蓝色漂白剂洗（白色衣服）。
〈英， 非正式，旧〉 挥霍，乱花（钱财）。
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do something until （或till ）one is blue in the face informal put all one's efforts into doing something to no avail 〈非正式〉 累死累活白干一场，忙得脸色发紫she could talk to him until she was blue in the face, but he was just not hearing . 她可以和他谈到累死，可他只当没听见 -
once in a blue moon informal very rarely. 〈非正式〉 难得有一次，极为罕见 -
［ORIGIN because ‘a blue moon' is a phenomenon that never occurs．］
out of the blue （或out of a clear blue sky ）informal without warning; unexpectedly 〈非正式〉 出乎意外地，突然she phoned me out of the blue . 她突然给我打电话 -
［ORIGIN with reference to a ‘blue' （i.e. clear） sky, from which nothing unusual is expected．］
scream （或yell） blue murder 见MURDER .talk a blue streak N. Amer. informal speak continuously and at great length 〈北 美，非正式〉 喋喋不休，没完没了地说
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blue sky 蓝天
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blue seas 蓝色大海
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in blue 穿蓝色衣服
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dark/light blue 深蓝色/浅蓝色
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shades of blue 蓝色
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colourful blues and reds 鲜艳的蓝色和红色
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feel blue 感到沮丧
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a blues band/song/singer 布鲁斯乐队/歌曲/歌手
真题例句：
"Middle English： from Old French
