Blues is a text form. It has three lines in the form a a b. The last syllable of each line should rhyme. I walked through that door, and saw that she was cold gone. Her bags packed, and her car revved up long before the dawn.
Blues is a musical form, the basis of blues and jazz composition.
Blues is an emotion. Blues is a tonality. Blues is poetic expression with its own unique form. It uses poetic devices such as metaphors, similes, and symbols. Blues is a story.