Definition of "Blue" :
noun: any of numerous small butterflies of the family Lycaenidae
noun: the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
noun: blue clothing
"She was wearing blue."
noun: blue color or pigment; resembling the color of the clear sky in the daytime
"He had eyes of bright blue."
noun: any organization or party whose uniforms or badges are blue
"The Union army was a vast blue."
noun: the sky as viewed during daylight
"He shot an arrow into the blue."
noun: used to whiten laundry or hair or give it a bluish tinge
verb: turn blue
adjective: causing dejection
"A blue day."
adjective: of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky
"October's bright blue weather."
adjective: characterized by profanity or cursing
adjective: filled with melancholy and despondency
"Lonely and blue in a strange city."
adjective: morally rigorous and strict
adjective: belonging to or characteristic of the nobility or aristocracy
"A blue family."
adjective: used to signify the Union forces in the American Civil War (who wore blue uniforms)
"A ragged blue line."
adjective: suggestive of sexual impropriety
"A blue movie."