adjective | noun
blueblue1 /blu/ ●●● S1 W1 adjective 1
having the color of the clear sky: the blue waters of the lakedark/light/bright/pale blue a dark blue sweater2[not before noun] informal sad and without hope SYN depressed: I’ve been feeling kind of blue lately.3do something till you’re blue in the face informal to do something a lot, without achieving what you want: You can argue with her till you’re blue in the face, but she won’t change her mind.4informal blue stories, jokes, etc. are about sex, in a way that might offend some people: blue language → see also blue movie, once in a blue moon at once1 (15), talk a blue streak at talk1 (36) [Origin: 1200–1300 Old French blou] adjective | noun
blueblue2 ●●● S3 W3 noun 1[countable, uncountable] the color of the sky on a clear day: the rich blues and reds of the painting Carolyn’s the one dressed in blue.2blues (also the blues [plural]) eng. lang. arts a slow sad style of music that came from the African-American culture in the southern U.S.: a blues singer → see also rhythm and blues3the blues [plural] informal feelings of sadness: A lot of women get the blues after the baby is born.4out of the blue informal suddenly and without warning: Symptoms of the disease often appear out of the blue. → see also a bolt from the blue at bolt1 (4)5the blue literary the ocean or the sky → see also the boys in blue at boy1 (8)