(noun, adjective, verb)


1. of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky

- October's bright blue weather

- a blue flame

- blue haze of tobacco smoke

Similar word(s): chromatic, blueish, bluish

2. used to signify the Union forces in the American Civil War (who wore blue uniforms)

- a ragged blue line

Similar word(s): northern

3. filled with melancholy and despondency

- lonely and blue in a strange city

Similar word(s): dejected, depressed, dispirited, down, downcast, downhearted, gloomy, grim, low

4. characterized by profanity or cursing

- blue language

Similar word(s): dirty, blasphemous, profane

5. suggestive of sexual impropriety

- a blue movie

- blue jokes

Similar word(s): sexy, gamey, gamy, juicy, naughty, racy, risque, spicy

6. belonging to or characteristic of the nobility or aristocracy

- a blue family

- blue blood

- the blue-blooded aristocracy

Similar word(s): noble, aristocratic, aristocratical, gentle, patrician

7. morally rigorous and strict

- blue laws

Similar word(s): nonindulgent, strict, puritanic, puritanical

8. causing depression

- a blue day

Similar word(s): cheerless, depressing, uncheerful, dark, dingy, disconsolate, dismal, drab, drear, dreary, gloomy, grim, sorry

Sentences with blue as an adjective:

- the deep blue sea

- The candle burns blue.

- The air was blue with oaths.  a blue movie

- I live in a blue constituency.  Congress turned blue in the mid-term elections.

- Illawarra turns blue in Liberal washout

- blue and sour religionists;  blue laws


1. blue color or pigment; resembling the color of the clear sky in the daytime

- he had eyes of bright blue

Similar word(s): blueness

Definition categories: attribute

2. blue clothing

- she was wearing blue

- The boys in blue marched to the pipers.

Definition categories: man–made, clothing, habiliment, vesture, wear, wearable

3. any organization or party whose uniforms or badges are blue

- the Union army was a vast blue

Definition categories: group, organisation, organization

4. the sky as viewed during daylight

- he shot an arrow into the blue

Definition categories: object, sky

5. used to whiten laundry or hair or give it a bluish tinge

Similar word(s): blueing, bluing

Definition categories: substance, dye, dyestuff

6. the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic

Definition categories: man–made, amobarbital

7. any of numerous small butterflies of the family Lycaenidae

Definition categories: animal, lycaenid

Sentences with blue as a noun:

- blue colour:

- The ball came out of the blue and cracked his windshield.

- His request for leave came out of the blue.


1. turn blue

Definition categories: change, color, colour, discolor, discolour