blue blue /ˈbluː/

adjective

1. () Of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky  ( blueish , bluey , bluish , blue )
   of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky
    October's bright blue weather
   October's bright blue weather
    A blue flame
   a blue flame
    Blue haze of tobacco smoke
   blue haze of tobacco smoke
   
2. () Used to signify the Union forces in the American Civil War (who wore blue uniforms)  ( blue )
   used to signify the Union forces in the American Civil War (who wore blue uniforms)
    A ragged blue line
   a ragged blue line
   
3. () [Informal] Characterized by profanity or cursing  ( blasphemous , blue [Informal] , profane )
   characterized by profanity or cursing
    Foul-mouthed and blasphemous
   foul-mouthed and blasphemous
    Blue language
   blue language
    Profane words
   profane words
   
4. () [Informal] Filled with melancholy and despondency  ( depressed , dispirited , down , down in the mouth , downcast , downhearted , gloomy , grim , low , blue [Informal] , low-spirited )
   filled with melancholy and despondency
    Gloomy at the thought of what he had to face
   gloomy at the thought of what he had to face
    Gloomy predictions
   gloomy predictions
    A gloomy silence
   a gloomy silence
    Took a grim view of the economy
   took a grim view of the economy
    The darkening mood
   the darkening mood
    Lonely and blue in a strange city
   lonely and blue in a strange city
    Depressed by the loss of his job
   depressed by the loss of his job
    A dispirited and resigned expression on her face
   a dispirited and resigned expression on her face
    Downcast after his defeat
   downcast after his defeat
    Feeling discouraged and downhearted
   feeling discouraged and downhearted
   
5. [Informal] Causing dejection  ( blue [Informal] , dark , dingy , disconsolate , dismal , drab , drear , dreary , gloomy , grim , sorry )
   causing dejection
    A blue day
   a blue day
    The dark days of the war
   the dark days of the war
    A week of rainy depressing weather
   a week of rainy depressing weather
    A disconsolate winter landscape
   a disconsolate winter landscape
    The first dismal dispiriting days of November
   the first dismal dispiriting days of November
    A dark gloomy day
   a dark gloomy day
    Grim rainy weather
   grim rainy weather
   
6. Morally rigorous and strict  ( blue , puritanic , puritanical )
   morally rigorous and strict
    Puritanic distaste for alcohol
   puritanic distaste for alcohol
    She was anything but puritanical in her behavior
   she was anything but puritanical in her behavior
    Blue laws
   blue laws
   
7. Belonging to or characteristic of the nobility or aristocracy  ( aristocratical , blue , blue-blooded , aristocratic , gentle [Archaic] , patrician )
   belonging to or characteristic of the nobility or aristocracy
    An aristocratic family
   an aristocratic family
    Aristocratic Bostonians
   aristocratic Bostonians
    Aristocratic government
   aristocratic government
    A blue family
   a blue family
    Blue blood
   blue blood
    The blue-blooded aristocracy
   the blue-blooded aristocracy
    Of gentle blood
   of gentle blood
    Patrician landholders of the American South
   patrician landholders of the American South
    Aristocratic bearing
   aristocratic bearing
    Aristocratic features
   aristocratic features
    Patrician tastes
   patrician tastes
   
8. [Informal] Suggestive of sexual impropriety  ( blue [Informal] , gamey [ N. American] , gamy [ N. American] , juicy [Informal] , naughty , racy , risque , spicy , risqué )
   suggestive of sexual impropriety
    A blue movie
   a blue movie
    Blue jokes
   blue jokes
    He skips asterisks and gives you the gamy details
   he skips asterisks and gives you the gamy details
    A juicy scandal
   a juicy scandal
    A naughty wink
   a naughty wink
    Naughty words
   naughty words
    Racy anecdotes
   racy anecdotes
    A risque story
   a risque story
    Spicy gossip
   spicy gossip
   

noun

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

verb

1. Turn blue  ( blue )
   turn blue