blues
n. uncountablen. a feeling of sadness or low spirits. It also refers to a style of music that started in the southern US, often about hard times and deep feelings.
n. a state of depression or melancholy; also, a genre of music originating in African-American communities, characterized by a specific chord progression and expressive, soulful lyrics.
I always get the Sunday night blues before work.
After the long holiday ended, she struggled with a mild case of the winter blues.
The guitarist's performance captured the raw essence of the blues, blending technical precision with a mournful tone that resonated through the crowded hall.
Always used in the plural form ('the blues') even when referring to a single mood or the musical genre.
He is playing a blue.He is playing the blues.The word is always plural when referring to the musical genre or a sad mood.