blue
/blu:; blu/ adj
1 having the colour of a clear sky or the sea on a sunny day 蓝色的; 天蓝色的; 蔚蓝的; 青色的: blue eyes 蓝眼睛
a blue dress, shirt, etc 蓝衣服、衬衫等
He was blue in the face, ie His face was a purplish colour because of cold or exertion. 他脸色发青（因寒冷或用力过度而稍泛紫色）.
Her hands were blue with cold. 她的双手都冻青了. =>illus at spectrum 见spectrum之插图.
2 [pred 作表语]
(infml 口) sad; depressed 忧伤; 沮丧
Don't look so blue smile! 别这样愁眉苦脸的--笑一笑吧!
3 indecent; pornographic 下流的; 色情的
a blue film/movie/joke 黄色的影片[电影/笑话].
4 (idm 习语) black and blue => black1. sb's ,blue-eyed `boy (infml esp Brit usu derog 口, 通常作贬义) favourite of a person or group; darling; pet 亲信; 宠儿; 宝贝儿; 宠物
He's the manager's blue-eyed boy. 他是经理的亲信. once in a blue moon => once. scream, etc blue `murder (infml 口) protest wildly and noisily 强烈抗议; 哗然反对
The union yelled blue murder when one of its members was sacked. 有一会员遭解雇, 工会表示强烈抗议. (do sth) till one is blue in the `face (infml 口) (work, etc) as hard and as long as one possibly can (usu without success) （工作等）努力和持久到了极点（通常并不成功）
He can write me letters till he's blue in the face, I'm not going to reply. 任他没完没了地给我写信, 我就是不回信.
blue / blu:; blu/ n
1
(a) [C, U] blue colour 蓝色; 青色
light/dark blue 浅[深]蓝色
material with a lot of blue in it 蓝色成分多的材料.
(b) [U] blue clothes 蓝色服装
dressed in blue 穿著蓝色衣服.
2 [C]
(a) (Brit) distinction awarded to a sportsman who represents either Oxford or Cambridge University in a match between the two 蓝色荣誉（授予代表牛津或剑桥大学参加两校比赛的运动员的最高荣誉）
get a/one's blue for cricket, football, etc 参加牛津与剑桥两校板球、足球等比赛而获得蓝色荣誉.
(b) person who has won a blue 获得蓝色荣誉的人
an Oxford/a Cambridge (hockey) blue 牛津[剑桥]（曲棍球）蓝色荣誉获得者.
3 the blue [sing]
(dated infml 旧, 口) sea or sky 大海; 蓝天
The boat sailed off into the blue. 小船已驶出海.
4 [sing or pl v]
(a) the blues slow melancholy jazz music originating among Blacks in the southern US 布鲁斯音乐（源自美国南方黑人中情调忧郁的慢速爵士音乐）
[attrib 作定语]
a blues singer, melody 布鲁斯歌手、曲调.
(b) blues song of this type 布鲁斯歌曲
sing a blues 唱布鲁斯歌曲.
5 the blues [pl]
(infml 口) feelings of deep sadness or depression 极其忧伤或沮丧的情绪
have (an attack of) the blues 觉得伤心.
6 (idm 习语) a bolt from the blue => bolt1. the boys in blue =>boy1. out of the `blue unexpected(ly); without warning 意外（的）; 未事先告知
She arrived out of the blue. 她没有事先告知就来了.
His resignation came (right) out of the blue. 他突然辞职, 使人感到意外.
blue / blu:; blu/ v [Tn]
(infml 口) spend (money) recklessly 乱花（钱）
He won 500 and then blued the lot in three days. 他赢了500英镑, 可是才三天就花得精光.