What is the meaning of blue?

noun

• Blue color or pigment; resembling the color of the clear sky in the daytime.
  • usage: "he had eyes of bright blue"
  • synonyms: blueness
• Blue clothing.
  • usage: "she was wearing blue"
• Any organization or party whose uniforms or badges are blue.
  • usage: "the Union army was a vast blue"
• The sky as viewed during daylight.
  • usage: "he shot an arrow into the blue"
  • synonyms: blue sky, blue air, wild blue yonder
• Used to whiten laundry or hair or give it a bluish tinge.
  • synonyms: bluing, blueing
• The sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic.
  • synonyms: amobarbital sodium, blue angel, blue devil, Amytal
• Any of numerous small butterflies of the family Lycaenidae.

verb

• Turn blue.

adjective

• Of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky.
  • usage: "October's bright blue weather- Helen Hunt Jackson; "a blue flame"; "blue haze of tobacco smoke"
  • synonyms: bluish, blueish
• Used to signify the Union forces in the American Civil War (who wore blue uniforms. )
  • usage: "a ragged blue line"
• Filled with melancholy and despondency .
  • usage: "gloomy at the thought of what he had to face"; "gloomy predictions"; "a gloomy silence"; "took a grim view of the economy"; "the darkening mood"; "lonely and blue in a strange city"; "depressed by the loss of his job"; "a dispirited and resigned expression on her face"; "downcast after his defeat"; "feeling discouraged and downhearted"
  • synonyms: gloomy, grim, depressed, dispirited, down, downcast, downhearted, down in the mouth, low, low-spirited
• Characterized by profanity or cursing.
  • usage: "foul-mouthed and blasphemous"; "blue language"; "profane words"
  • synonyms: blasphemous, profane
• Suggestive of sexual impropriety.
  • usage: "a blue movie"; "blue jokes"; "he skips asterisks and gives you the gamy details"; "a juicy scandal"; "a naughty wink"; "naughty words"; "racy anecdotes"; "a risque story"; "spicy gossip"
  • synonyms: gamy, gamey, juicy, naughty, racy, risque, spicy
• Belonging to or characteristic of the nobility or aristocracy.
  • usage: "an aristocratic family"; "aristocratic Bostonians"; "aristocratic government"; "a blue family"; "blue blood"; "the blue-blooded aristocracy"; "of gentle blood"; "patrician landholders of the American South"; "aristocratic bearing"; "aristocratic features"; "patrician tastes"
  • synonyms: aristocratic, aristocratical, blue-blooded, gentle, patrician
• Morally rigorous and strict.
  • usage: "the puritan work ethic"; "puritanic distaste for alcohol"; "she was anything but puritanical in her behavior"
  • synonyms: puritanic, puritanical
• Causing dejection.
  • usage: "a blue day"; "the dark days of the war"; "a week of rainy depressing weather"; "a disconsolate winter landscape"; "the first dismal dispiriting days of November"; "a dark gloomy day"; "grim rainy weather"
  • synonyms: dark, dingy, disconsolate, dismal, gloomy, grim, sorry, drab, drear, dreary