blue

/blu:/
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blue

The sky is a clear, bright blue on a sunny day.

Definition
  1. Noun:

    • A color: The color of the clear sky on a sunny day; the color between green and violet in the visible spectrum.
    • The sky or the sea: Used poetically or descriptively to refer to the sky or a large body of water.
    • A feeling of sadness: A state of melancholy or depression (often used with 'the').
    • A person or team: A sports player or team representing a university (especially Oxford or Cambridge) or wearing blue uniforms.
    • A type of butterfly: Any of numerous small butterflies of the family Lycaenidae, often with blue coloring on their wings.
    • A chemical substance: A blue dye, pigment, or a specific chemical compound like a barbiturate sedative.
  2. Adjective:

    • Of the color blue: Having the hue of a clear sky.
    • Sad, melancholy: Feeling or showing unhappiness or depression.
    • Risqué, indecent: Referring to jokes, language, or material that is sexually suggestive or profane.
    • Aristocratic, noble: Belonging to or characteristic of high social rank (from the term 'blue blood').
    • Rigidly moral, puritanical: Characterized by strict moral codes, especially regarding pleasure.
    • Relating to a political faction: Pertaining to a group whose identifying color is blue, such as the Union (Northern) forces in the American Civil War.
  3. Verb:

    • To make or become blue: To give a blue color to something, or to turn the color blue.
Usage Examples
  • Noun (Color):
    • She painted her room a bright blue.
    • He had eyes of a deep, vivid blue.
  • Noun (Sky/Sea):
    • The balloon disappeared into the blue.
    • He loves sailing on the blue.
  • Noun (Sadness):
    • She's been suffering from the blues lately.
    • Listening to that music gives me the blues.
  • Adjective (Color):
    • They live in a blue house with a white door.
    • The blue flame indicates complete combustion.
  • Adjective (Sad):
    • He felt blue after his friend moved away.
    • It was a blue, rainy Monday morning.
  • Adjective (Indecent):
    • He told a rather blue joke at the party.
    • The comedian's act was full of blue language.
  • Verb:
    • The cold weather caused his lips to blue.
    • She blued the fabric with indigo dye.
Advanced Usage
  • "Out of the blue": Suddenly and unexpectedly.
    • His resignation came completely out of the blue.
  • "Once in a blue moon": Very rarely.
    • We only see them once in a blue moon.
  • "Blue blood": Noble or aristocratic lineage.
    • The family prided themselves on their blue blood.
  • "Blue-collar": Relating to manual work or workers (Note: This is a compound word listed as a variant).
  • "True blue": Extremely loyal and faithful.
    • He's a true blue supporter of the team.
Variants and Related Words
  • Bluish/Blueish (adj): Somewhat blue.
  • Blueness (n): The quality or state of being blue.
  • Blueberry (n): A small blue fruit.
  • Blueprint (n): A detailed plan or technical drawing.
  • Blues (n, plural): A genre of music characterized by a melancholic mood; also, feelings of depression.
  • Blue-collar (adj): Pertaining to manual labor jobs.
  • Blue-chip (adj): Denoting companies or stocks considered reliable and profitable.
Synonyms
  • Azure, Cobalt, Sapphire (for the color).
  • Melancholy, Gloomy, Downcast (for sadness).
  • Risqué, Ribald, Bawdy (for indecent content).
  • Aristocratic, Patrician, Noble (for high social rank).
Related Phrasal Verbs/Phrases
  • Blue out: (Rare) To become blue or to make something blue.
  • Blue up: (Informal, rare) To become sad or depressed.
Related Idioms
  • Scream/shout blue murder: To protest or complain very loudly and angrily.
    • He started shouting blue murder when he saw the parking ticket.
  • Between the devil and the deep blue sea: In a difficult situation where both choices are bad.
    • I'm between the devil and the deep blue sea; I can either take a pay cut or lose my job.
  • Talk a blue streak: To talk very quickly and at great length.
    • Once she gets started, she can talk a blue streak for hours.
blue

The sky is a clear, bright blue on a sunny day.

Noun
  1. any of numerous small butterflies of the family Lycaenidae
  2. the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
  3. used to whiten laundry or hair or give it a bluish tinge
  4. the sky as viewed during daylight
    • he shot an arrow into the blue
  5. any organization or party whose uniforms or badges are blue
    • the Union army was a vast blue
  6. blue clothing
    • she was wearing blue
  7. blue color or pigment; resembling the color of the clear sky in the daytime
    • he had eyes of bright blue
Adjective
  1. causing dejection
    • 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
  2. morally rigorous and strict
    • the puritan work ethic
    • puritanic distaste for alcohol
    • she was anything but puritanical in her behavior
  3. belonging to or characteristic of the nobility or aristocracy
    • 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
  4. suggestive of sexual impropriety
    • 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
  5. characterized by profanity or cursing
    • foul-mouthed and blasphemous
    • blue language
    • profane words
  6. filled with melancholy and despondency
    • 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
  7. used to signify the Union forces in the American Civil War (who wore blue uniforms)
    • a ragged blue line
  8. 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
    • blue haze of tobacco smoke
Verb
  1. turn blue