"cosmological horizon" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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      "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",
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          "observer",
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        [
          "universe",
          "universe"
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        [
          "luminal",
          "luminal"
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      "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": [
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        "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."
      ],
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          "astronomy",
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        "(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"
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      "wikipedia": [
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  "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"
}