1. • noun - blue color or pigment
   • noun - blue clothing
   • noun - any organization or party whose uniforms or badges are blue
   • noun - the sky as viewed during daylight
   • noun - used to whiten laundry or hair or give it a bluish tinge
   • noun - the sodium salt of amobarbital that is used as a barbiturate
   • noun - any of numerous small butterflies of the family Lycaenidae
   • verb - turn blue
   • adj - of the color intermediate between green and violet
   • adj - used to signify the Union forces in the American Civil War (who wore blue uniforms)
   • adj - filled with melancholy and despondency
   • adj - characterized by profanity or cursing
   • adj - suggestive of sexual impropriety
   • adj - belonging to or characteristic of the nobility or aristocracy
   • adj - morally rigorous and strict
   • adj - causing dejection
2. • The hue of that portion of the visible spectrum lying between green and indigo, evoked in the human observer by radiant energy with wavelengths of approximately 450 to 490 nanometers; any of a group of colors that may vary in lightness and saturation, whose hue is that of a clear daytime sky; one of the additive or light primaries; one of the psychological primary hues.
   • A pigment or dye imparting this hue.
   • Bluing.
   • An object having this hue.
   • Dress or clothing of this hue: The ushers wore blue.
   • A person who wears a blue uniform.
   • Often Blue.
   • A member of the Union Army in the Civil War.
   • The Union Army.
   • A bluefish.
   • A small blue butterfly of the family Lycaenidae.
   • The sky.
   • The sea.
   • Of the color blue.
   • Bluish or having parts that are blue or bluish, as the blue spruce and the blue whale.
   • Having a gray or purplish color, as from cold or contusion.
   • Wearing blue.
   • Gloomy; depressed.
   • Dismal; dreary: a blue day.
   • Puritanical; strict.
   • Aristocratic; patrician.
   • Indecent; risqué: a blue joke; a blue movie.
   • From an unexpected or unforeseen source: criticism that came out of the blue.
   • At a completely unexpected time: arrived out of the blue.
3. • adj - having the color of the clear sky

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