- blue, blueness - the color of the clear sky in the daytime; "he had eyes of bright blue"
--1 is a kind of black music, African-American music; folk song, folksong, folk ballad; chromatic color, chromatic colour, spectral color, spectral colour; black music, African-American music; folk song, folksong, folk ballad; chromatic color, chromatic colour, spectral color, spectral colour
--1 has part: blue note
--1 has particulars:Derived form: verb blue1 - blue - blue clothing; "she was wearing blue"
--2 is a kind of depression; clothing, article of clothing, vesture, wear; depression; clothing, article of clothing, vesture, wear
- blue - any organization or party whose uniforms or badges are blue; "the Union army was a vast blue"
--3 is a kind of organization, organisation; organization, organisation
--3 has particulars: Union Army; blue; Union Army- blue sky, blue, blue air, wild blue yonder - the sky as viewed during daylight; "he shot an arrow into the blue"
--4 is a kind of sky; sky
- bluing, blueing, blue - used to whiten laundry or hair or give it a bluish tinge
--5 is a kind of dye, dyestuff; dye, dyestuff
- amobarbital sodium, blue, blue angel, blue devil, Amytal - the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
--6 is a kind of amobarbital; amobarbital
- blue - any of numerous small chiefly blue butterflies of the family Lycaenidae
--7 is a kind of lycaenid, lycaenid butterfly; lycaenid, lycaenid butterfly
--7 is a member of Lycaena, genus Lycaena - blue - any organization or party whose uniforms or badges are blue; "the Union army was a vast blue"