"black hole" meaning in English

{
  "forms": [
    {
      "form": "black hole",
      "raw_tags": [
        "Singular"
      ]
    },
    {
      "form": "black holes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "text": "Certain stars form a couple with a black hole, turning around each other : the matter of the star is progressively swallowed by the black hole."
        }
      ],
      "glosses": [
        "A black hole is a round invisible astronomical body with no solid surface and is compact enough to attract light and swallow it. That's why it remains usually invisible."
      ],
      "id": "simple-black_hole-en-noun-G2yrxQCt",
      "raw_tags": [
        "countable"
      ]
    }
  ],
  "word": "black hole"
}

{
  "forms": [
    {
      "form": "black hole",
      "raw_tags": [
        "Singular"
      ]
    },
    {
      "form": "black holes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Countable nouns"
      ],
      "examples": [
        {
          "text": "Certain stars form a couple with a black hole, turning around each other : the matter of the star is progressively swallowed by the black hole."
        }
      ],
      "glosses": [
        "A black hole is a round invisible astronomical body with no solid surface and is compact enough to attract light and swallow it. That's why it remains usually invisible."
      ],
      "raw_tags": [
        "countable"
      ]
    }
  ],
  "word": "black hole"
}