Other forms: blues; bluer; bluest; blued; bluing; blueing; bluely

Among other things, blue is a color and a dreary mood. If the blue sky and ocean have turned gray and stormy, you might be blue because your day at the beach is ruined.

Whether it's a primary color or a saddened mood, blue is used often as an adjective for people and things. Blue is a mix of green and purple shades, and it's the favorite color of many. The color blue might bring thoughts of first-place blue ribbons or police officers in blue uniforms, and it colors many flags of the world. Blue is everywhere, but there isn't a lot of blue food unless it's colored with dye. Even blueberries are mostly purple.

Definitions of blue
  1. adjective
    of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky
    “"October's bright blue weather"- Helen Hunt Jackson”
    “a blue flame”
    synonyms: blueish, bluish
    being, having, or characterized by hue
  2. noun
    blue color or pigment; resembling the color of the clear sky in the daytime
    “he had eyes of bright blue
    synonyms: blueness
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    azure, cerulean, lazuline, sapphire, sky-blue
    a light shade of blue
    powder blue
    a pale blue color with grey in it
    steel blue
    a greyish blue color
    Prussian blue
    a dark greenish-blue color
    dark blue, navy, navy blue
    a dark shade of blue
    aqua, aquamarine, cobalt blue, greenish blue, peacock blue, turquoise
    a shade of blue tinged with green
    purplish blue, royal blue
    a shade of blue tinged with purple
    a vivid blue to purple-blue color
    type of:
    chromatic color, chromatic colour, spectral color, spectral colour
    a color that has hue
  3. noun
    the sky as viewed during daylight
    “he shot an arrow into the blue
    synonyms: blue air, blue sky, wild blue yonder
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    type of:
    the atmosphere and outer space as viewed from the earth
  4. verb
    turn blue
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    type of:
    color, colour, discolor, discolour
    change color, often in an undesired manner
  5. noun
    blue clothing
    “she was wearing blue
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    type of:
    article of clothing, clothing, habiliment, vesture, wear, wearable
    a covering designed to be worn on a person's body
  6. noun
    any organization or party whose uniforms or badges are blue
    “the Union army was a vast blue
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    Union Army
    the northern army during the American Civil War
    type of:
    organisation, organization
    a group of people who work together
  7. adjective
    used to signify the Union forces in the American Civil War (who wore blue uniforms)
    “a ragged blue line”
    in or characteristic of a region of the United States north of (approximately) the Mason-Dixon line
  8. adjective
    filled with melancholy and despondency
    “lonely and blue in a strange city”
    synonyms: depressed, dispirited, down, down in the mouth, downcast, downhearted, gloomy, grim, low, low-spirited
    affected or marked by low spirits
  9. adjective
    causing dejection
    “a blue day”
    synonyms: dark, dingy, disconsolate, dismal, drab, drear, dreary, gloomy, grim, sorry
    cheerless, depressing, uncheerful
    causing sad feelings of gloom and inadequacy
  10. adjective
    characterized by profanity or cursing
    blue language”
    synonyms: blasphemous, profane
    (of behavior or especially language) characterized by obscenity or indecency
  11. adjective
    suggestive of sexual impropriety
    “a blue movie”
    blue jokes”
    synonyms: gamey, gamy, juicy, naughty, racy, risque, spicy
    marked by or tending to arouse sexual desire or interest
  12. adjective
    belonging to or characteristic of the nobility or aristocracy
    “a blue family”
    blue blood”
    “the blue-blooded aristocracy”
    synonyms: aristocratic, aristocratical, blue-blooded, gentle, patrician
    of or belonging to or constituting the hereditary aristocracy especially as derived from feudal times
  13. adjective
    morally rigorous and strict
    synonyms: puritanic, puritanical
    nonindulgent, strict
    characterized by strictness, severity, or restraint
  14. noun
    the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
    synonyms: Amytal, amobarbital sodium, blue angel, blue devil
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    type of:
    a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant
  15. noun
    any of numerous small butterflies of the family Lycaenidae
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    type of:
    lycaenid, lycaenid butterfly
    any of various butterflies of the family Lycaenidae
  16. noun
    used to whiten laundry or hair or give it a bluish tinge
    synonyms: blueing, bluing
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    type of:
    dye, dyestuff
    a usually soluble substance for staining or coloring e.g. fabrics or hair




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