noun

• (usually in the plural, informal) A feeling of sadness or depression.
  "I've got the blues today."
• (usually in the plural, informal) A feeling of sadness or depression.
  "Your blues is just like mine."
• (usually in the plural, informal) A feeling of sadness or depression.
  "I've got the lonely man's blues."
• (music) A musical form, African-American in origin, generally featuring an eight-bar or twelve-bar blues structure and using the blues scale.
  "Many great blues musicians came from the Mississippi Delta region."

name

• (informal) Any of several sports teams whose uniform is predominantly blue, such as:
  "'Constantinople adopted the follies, though not the virtues of ancient Rome,' wrote Edward Gibbon, 'and the same factions which had agitated the circus raged with redoubled fury in the Hippodrome.' Gibbon's judgment was that what produced the 'redoubled fury' in the Hippodrome was senseless hooliganism, and even though the Blues and Greens could be politicized upon occasion, they had no coherent aims, religious or political. Gibbon's successors had alternative suggestions, the most persistent of which has been that the Blues were supporters of religious orthodoxy and the Greens of Monophysitism."
• (informal) Any of several sports teams whose uniform is predominantly blue, such as:
• (informal) Any of several sports teams whose uniform is predominantly blue, such as:
• (informal) Any of several sports teams whose uniform is predominantly blue, such as: