blue 1 S1 W2 / blu / 形容词

1 having the colour of the sky or the sea on a fine day → navy , navy blue :

the blue waters of the lake

dark/light/pale/bright blue

a dark blue raincoat

2 [名词前不用] informal sad and without hope 同义词 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 名词 [不可数名词] → black and blue , → once in a blue moon at once 1 ( 15 ) , → scream blue murder at scream 1 ( 1 )