"deep background" meaning in English

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      "expansion": "deep background (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "American English",
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          "langcode": "en",
          "name": "Mass media",
          "orig": "en:Mass media",
          "parents": [
            "Culture",
            "Media",
            "Society",
            "Communication",
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            "Fundamental"
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      "glosses": [
        "The status of information acquired from a source that may be used, but without either naming or directly quoting the source."
      ],
      "id": "en-deep_background-en-noun-b32rWF8W",
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      "raw_glosses": [
        "(US, journalism) The status of information acquired from a source that may be used, but without either naming or directly quoting the source."
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        "US",
        "uncountable"
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      "topics": [
        "journalism",
        "media"
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  "word": "deep background"
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      "expansion": "deep background (uncountable)",
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  "lang_code": "en",
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        "The status of information acquired from a source that may be used, but without either naming or directly quoting the source."
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          "information",
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        "(US, journalism) The status of information acquired from a source that may be used, but without either naming or directly quoting the source."
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  "word": "deep background"
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