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definitions

blues

1
[blooz]
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noun

the blues, (used with a plural verb) depressed spirits; despondency; melancholy: This rainy spell is giving me the blues.
(used with a singular verb) Jazz.
  1. a song, originating with American blacks, that is marked by the frequent occurrence of blue notes, and that takes the basic form, customarily improvised upon in performance, of a 12-bar chorus consisting of a 3-line stanza with the second line repeating the first.
  2. the genre constituting such songs.

Origin of blues

1
1800–10, Americanism; cf. blue devils
Related formsblues·y, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for bluesy

Blues

pl n

the Blues British the Royal Horse Guards

blues

pl n the blues (sometimes functioning as singular)

a feeling of depression or deep unhappiness
a type of folk song devised by Black Americans at the beginning of the 20th century, usually employing a basic 12-bar chorus, the tonic, subdominant, and dominant chords, frequent minor intervals, and blue notes
Derived Formsbluesy, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for bluesy
adj.

1946, from blues + -y (2).

blues

n.

as a music form featuring flatted thirds and sevenths, possibly c.1895 (though officially 1912, in W.C. Handy's "Memphis Blues"); meaning "depression, low spirits" goes back to 1741, from adjectival blue "low-spirited," late 14c.

Online Etymology Dictionary, © 2010 Douglas Harper
bluesy in Culture

blues

A kind of jazz that evolved from the music of African-Americans, especially work songs and spirituals (see also spirituals), in the early twentieth century. Blues pieces often express worry or depression.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Idioms and Phrases with bluesy

blues

see have the blues.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.