blue
blue1 S1 W2 /bluː/ 
adjective
the blue waters of the lake
dark/light/pale/bright blue
a dark blue raincoat
2. [not before noun] informal sad and without hope
SYN depressed:
I’ve been feeling kind of blue.
3. informal blue jokes, stories etc are about sex, in a way that might offend some people ⇨ blue movie
4. argue/talk etc till you’re blue in the face informal to argue, talk etc about something a lot, but without achieving what you want:
You can tell them till you’re blue in the face, but they’ll still do what they want.
5. blue with cold especially British English someone who is blue with cold looks extremely cold
6. go blue British English if someone goes blue, their skin becomes blue because they are cold or cannot breathe properly
7. talk a blue streak American English informal to talk very quickly without stopping
—blueness noun [uncountable]
⇨ black and blue, ⇨ once in a blue moon at once1(15), ⇨ scream blue murder at scream1(1)
blue2 noun
1. [uncountable and countable] the colour of the sky or the sea on a fine day:
She nearly always dresses in blue.
the rich greens and blues of the tapestry
2. blues (also the blues) [uncountable] a slow sad style of music that came from the southern US:
a blues singer ⇨ rhythm and blues
3. the blues [plural] informal feelings of sadness:
A lot of women get the blues after the baby is born.
4. out of the blue informal if something happens out of the blue, it is very unexpected ⇨ a bolt from/out of the blue at bolt1(3)
5. Blue [countable] British English someone who has represented Oxford or Cambridge University at a sport, or the title given to such a person
6. the blue literary the sea or the sky ⇨ boys in blue at boy1(9)
| I |
adjective Date: 1200-1300
Language: Old French
Origin: blou
1. having the colour of the sky or the sea on a fine day ⇨ navy, navy blue:Language: Old French
Origin: blou
dark/light/pale/bright blue
2. [not before noun] informal sad and without hope
SYN depressed:
3. informal blue jokes, stories etc are about sex, in a way that might offend some people ⇨ blue movie
4. argue/talk etc till you’re blue in the face informal to argue, talk etc about something a lot, but without achieving what you want:
5. blue with cold especially British English someone who is blue with cold looks extremely cold
6. go blue British English if someone goes blue, their skin becomes blue because they are cold or cannot breathe properly
7. talk a blue streak American English informal to talk very quickly without stopping
—blueness noun [uncountable]
⇨ black and blue, ⇨ once in a blue moon at once1(15), ⇨ scream blue murder at scream1(1)
| II |
noun1. [uncountable and countable] the colour of the sky or the sea on a fine day:
2. blues (also the blues) [uncountable] a slow sad style of music that came from the southern US:
3. the blues [plural] informal feelings of sadness:
4. out of the blue informal if something happens out of the blue, it is very unexpected ⇨ a bolt from/out of the blue at bolt1(3)
5. Blue [countable] British English someone who has represented Oxford or Cambridge University at a sport, or the title given to such a person
6. the blue literary the sea or the sky ⇨ boys in blue at boy1(9)