"cosmological horizon" meaning in English

{
  "forms": [
    {
      "form": "cosmological horizons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cosmological horizon (plural cosmological horizons)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Astronomy",
          "orig": "en:Astronomy",
          "parents": [
            "Sciences",
            "Space",
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            "Nature",
            "Fundamental"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Cosmology",
          "orig": "en:Cosmology",
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            "Astronomy",
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "The distance from an observer in a universe beyond which it is impossible for the observer to see, as the light (or other luminal particles) cannot have travelled that distance over the current age of that universe."
      ],
      "id": "en-cosmological_horizon-en-noun-R6AoCWTC",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "observer",
          "observer"
        ],
        [
          "universe",
          "universe"
        ],
        [
          "luminal",
          "luminal"
        ]
      ],
      "raw_glosses": [
        "(astronomy) The distance from an observer in a universe beyond which it is impossible for the observer to see, as the light (or other luminal particles) cannot have travelled that distance over the current age of that universe."
      ],
      "synonyms": [
        {
          "word": "Hubble horizon"
        },
        {
          "word": "particle horizon"
        },
        {
          "word": "comoving horizon"
        },
        {
          "word": "cosmic light horizon"
        },
        {
          "word": "cosmic event horizon"
        },
        {
          "word": "cosmological event horizon"
        }
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "cosmological horizon"
      ]
    }
  ],
  "word": "cosmological horizon"
}

{
  "forms": [
    {
      "form": "cosmological horizons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cosmological horizon (plural cosmological horizons)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
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        "en:Cosmology"
      ],
      "glosses": [
        "The distance from an observer in a universe beyond which it is impossible for the observer to see, as the light (or other luminal particles) cannot have travelled that distance over the current age of that universe."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "observer",
          "observer"
        ],
        [
          "universe",
          "universe"
        ],
        [
          "luminal",
          "luminal"
        ]
      ],
      "raw_glosses": [
        "(astronomy) The distance from an observer in a universe beyond which it is impossible for the observer to see, as the light (or other luminal particles) cannot have travelled that distance over the current age of that universe."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "cosmological horizon"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Hubble horizon"
    },
    {
      "word": "particle horizon"
    },
    {
      "word": "comoving horizon"
    },
    {
      "word": "cosmic light horizon"
    },
    {
      "word": "cosmic event horizon"
    },
    {
      "word": "cosmological event horizon"
    }
  ],
  "word": "cosmological horizon"
}