名詞 blues:

1. a type of folksong that originated among Black Americans at the beginning of the 20th century; has a melancholy sound from repeated use of blue notes
2. a state of depression
   同義詞：blue devils, megrims, vapors, vapours

名詞 blue:

1. blue color or pigment; resembling the color of the clear sky in the daytime
   同義詞：blue, blueness
2. blue clothing
   同義詞：blue
3. any organization or party whose uniforms or badges are blue
   同義詞：blue
4. the sky as viewed during daylight
   同義詞：blue sky, blue, blue air, wild blue yonder
5. used to whiten laundry or hair or give it a bluish tinge
   同義詞：bluing, blueing, blue
6. the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
   同義詞：amobarbital sodium, blue, blue angel, blue devil, Amytal
7. any of numerous small butterflies of the family Lycaenidae
   同義詞：blue

動詞 blue:

1. turn blue
   同義詞：blue

1. She called me every now and then to sing the blues about her troubles.
   她時常打電話給我對她反遇到的麻煩發(fā)牢騷。
2. The blues was/were first performed by the black people.
   布魯斯音樂最初是由黑人演奏的。
3. No one sings the blues like she did.
   唱布魯斯歌誰也比不上她。

blues

pl.n.(used with a sing. or pl. verb)（復數(shù)名詞）（與單數(shù)或復數(shù)動詞連用）
A state of depression or melancholy:
憂郁，郁悶：憂郁或壓抑的情緒：
例句：
The blues has finally gotten me today. I really have the blues today.
憂郁的情結(jié)今天最終還是降臨到我心頭。我今天情緒確實有些不好

Music A style of music evolved from southern Black American secular songs and usually distinguished by slow tempo and flatted thirds and sevenths.
【音樂】 藍調(diào)音樂，布魯斯：一種源于美國南部黑人通俗歌曲的音樂風格，通常表現(xiàn)為音速低緩，演奏第三和第七音節(jié)的降音調(diào)

來源：
Short for blue devils
blue devils的簡寫

【引伸】
blues.man
n.（名詞）
blues.y
adj.（形容詞）