Word
blue
US/ˈbɫu/
UK/blˈuː/
Definitions
01the colour
A1 · Beginner Uncountable noun
n. the colour of the clear sky or the sea.
n. the colour between green and violet in the visible spectrum; one of the primary additive colours.
“The artist used a bright blue for the sky in her painting.”
“The deep blue of the Mediterranean was captured perfectly in the photographer's latest series of coastal landscapes.”
02colour description
A1 · Beginner
adj. having the colour of the sky or sea.
adj. possessing a blue hue or tint.
“He wore a blue shirt that matched his eyes.”
“The architect specified blue tinted glass for the skyscraper to reflect the surrounding atmosphere.”
03feeling sad
B1 · Intermediate Informal
adj. feeling sad, unhappy, or without hope.
adj. experiencing low spirits, melancholy, or mild depression.
“I was feeling a bit blue after my best friend moved away.”
“Despite the festive atmosphere, he couldn't help feeling blue on the anniversary of his father's passing.”
Synonyms
04political affiliation
B2 · Upper Intermediate Politics
adj. related to a specific political party, like the Democrats in the US or Conservatives in the UK.
adj. pertaining to a political party represented by the colour blue; usage varies by country.
“California is known as a blue state in American presidential elections.”
“The candidate focused her campaign efforts on traditionally blue districts where voter turnout was expected to be high.”
Antonyms
05obscene or risqué
C1 · Advanced Informal
adj. containing jokes or stories about sex that some people might find offensive.
adj. referring to content that is risqué, indecent, or contains profane language.
“The comedian was famous for his blue jokes that were only for adults.”
“The film was edited for television to remove the bluer segments of the dialogue that were deemed inappropriate for a general audience.”
06the sky or sea
B2 · Upper Intermediate Uncountable noun Literary
n. a poetic way to talk about the sky or the ocean.
n. a metonymic reference to the clear sky or the deep ocean.
“The eagle soared high up into the wide blue.”
“The sailors stared out into the endless blue, searching for any sign of land after weeks at sea.”
07an argument or fight
C2 · Proficiency Countable noun Dialect · Informal
n. a fight, a loud argument, or a mistake.
n. a physical brawl, a heated verbal argument, or a significant blunder.
“The two players got into a blue on the field during the game.”
“A massive blue erupted outside the pub after the local team lost the grand final.”
Usage
Primarily used in Australian and New Zealand English.
Teaching tip
Learners should be aware this is highly regional; in most other dialects, 'blue' never means a fight.
08to turn blue
C1 · Advanced Technical
v. to make something blue or to become blue.
v. to cause to become blue; to treat a surface so it takes on a blue tint.
Español:azular
“The cold weather blued his lips as he waited for the bus.”
“The craftsman carefully blued the steel barrels of the antique firearm to protect them from corrosion.”
Collocations
Common phrases and expressions where native English speakers use the word “blue” in context.
Real-World Examples
“The blue of the sky is the product of Rayleigh scattering, which affects light more at the blue end of the spectrum.” “The colour of the iconic dye is akin to a clear blue sky or the turquoise of the nearby Caribbean Sea.” “The blue of the sea and sky is as hard to grasp as the concept itself.” Etymology
From the German surname, Americanized from Blau or its French cognate Bleu.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
NOUN
ADJECTIVE
Related words
Idioms
01. blue chamber
02. blue devils
03. blue moon
04. blue note
05. blue ribbon
06. blue state
09. clear blue water
Show all 15
Domains
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A1 MoversIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.2.0–3.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 1.0–1.50–23TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.120–224
- Frequency
- Very common
- Level
- A1 · BeginnerOxford
- Updated
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QR code
englishreference.com/q/blue
Traducciones: Kaikki.org (Wiktionary), CC BY-SA 4.0