"have the blues" meaning in English

{
  "forms": [
    {
      "form": "has the blues",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "having the blues",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "had the blues",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "had the blues",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "have<has,,had> the blues"
      },
      "expansion": "have the blues (third-person singular simple present has the blues, present participle having the blues, simple past and past participle had the blues)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Mandarin terms with non-redundant manual transliterations",
          "parents": [
            "Terms with non-redundant manual transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "I've had the blues ever since my sweetheart left.",
          "type": "example"
        }
      ],
      "glosses": [
        "To be depressed; to have low morale; to feel sad."
      ],
      "id": "en-have_the_blues-en-verb-ON5jl4gR",
      "links": [
        [
          "depressed",
          "depressed"
        ],
        [
          "morale",
          "morale"
        ],
        [
          "sad",
          "sad"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, informal) To be depressed; to have low morale; to feel sad."
      ],
      "tags": [
        "idiomatic",
        "informal"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "be depressed",
          "word": "感到憂傷"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "gǎndào yōushāng",
          "sense": "be depressed",
          "word": "感到忧伤"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "be depressed",
          "word": "avoir le cafard"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "be depressed",
          "word": "broyer du noir"
        },
        {
          "alt": "ゆううつである",
          "code": "ja",
          "lang": "Japanese",
          "roman": "yūutsu de aru",
          "sense": "be depressed",
          "word": "憂鬱である"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "toskovátʹ",
          "sense": "be depressed",
          "tags": [
            "imperfective"
          ],
          "word": "тоскова́ть"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "grustítʹ",
          "sense": "be depressed",
          "tags": [
            "imperfective"
          ],
          "word": "грусти́ть"
        }
      ]
    }
  ],
  "word": "have the blues"
}

{
  "forms": [
    {
      "form": "has the blues",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "having the blues",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "had the blues",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "had the blues",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "have<has,,had> the blues"
      },
      "expansion": "have the blues (third-person singular simple present has the blues, present participle having the blues, simple past and past participle had the blues)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English terms with usage examples",
        "English verbs",
        "Mandarin terms with non-redundant manual transliterations"
      ],
      "examples": [
        {
          "text": "I've had the blues ever since my sweetheart left.",
          "type": "example"
        }
      ],
      "glosses": [
        "To be depressed; to have low morale; to feel sad."
      ],
      "links": [
        [
          "depressed",
          "depressed"
        ],
        [
          "morale",
          "morale"
        ],
        [
          "sad",
          "sad"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, informal) To be depressed; to have low morale; to feel sad."
      ],
      "tags": [
        "idiomatic",
        "informal"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "be depressed",
      "word": "感到憂傷"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "gǎndào yōushāng",
      "sense": "be depressed",
      "word": "感到忧伤"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "be depressed",
      "word": "avoir le cafard"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "be depressed",
      "word": "broyer du noir"
    },
    {
      "alt": "ゆううつである",
      "code": "ja",
      "lang": "Japanese",
      "roman": "yūutsu de aru",
      "sense": "be depressed",
      "word": "憂鬱である"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "toskovátʹ",
      "sense": "be depressed",
      "tags": [
        "imperfective"
      ],
      "word": "тоскова́ть"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "grustítʹ",
      "sense": "be depressed",
      "tags": [
        "imperfective"
      ],
      "word": "грусти́ть"
    }
  ],
  "word": "have the blues"
}