"first light" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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          "name": "Times of day",
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      "glosses": [
        "The time when light first appears in the morning; dawn, especially the start of dawn."
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      "id": "en-first_light-en-noun-Dc4b9HqJ",
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        [
          "dawn",
          "dawn"
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          "_dis1": "69 31",
          "word": "break of day"
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          "_dis1": "69 31",
          "word": "daybreak"
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        {
          "_dis1": "69 31",
          "word": "dayspring"
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        {
          "_dis1": "69 31",
          "word": "dawn"
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        {
          "_dis1": "69 31",
          "word": "cockcrow"
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          "_dis1": "69 31",
          "word": "firstlight"
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          "langcode": "en",
          "name": "Astronomy",
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        "The first use of a telescope or other instrument to capture an astronomical image."
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          "astronomy",
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          "telescope",
          "telescope"
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          "instrument",
          "instrument"
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          "image",
          "image"
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        "(astronomy) The first use of a telescope or other instrument to capture an astronomical image."
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        "natural-sciences"
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  "wikipedia": [
    "first light (astronomy)"
  ],
  "word": "first light"
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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "The time when light first appears in the morning; dawn, especially the start of dawn."
      ],
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          "dawn",
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        "The first use of a telescope or other instrument to capture an astronomical image."
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          "telescope",
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        "(astronomy) The first use of a telescope or other instrument to capture an astronomical image."
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        "natural-sciences"
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  "synonyms": [
    {
      "word": "break of day"
    },
    {
      "word": "daybreak"
    },
    {
      "word": "dayspring"
    },
    {
      "word": "dawn"
    },
    {
      "word": "cockcrow"
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    {
      "word": "firstlight"
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