"silver box" meaning in English

{
  "forms": [
    {
      "form": "silver boxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "es"
      },
      "expansion": "silver box (plural silver boxes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Telephony",
          "orig": "en:Telephony",
          "parents": [
            "Electronics",
            "Telecommunications",
            "Technology",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "beige box"
        },
        {
          "word": "black box"
        },
        {
          "word": "blue box"
        },
        {
          "word": "brown box"
        },
        {
          "word": "gray box"
        },
        {
          "word": "green box"
        },
        {
          "word": "orange box"
        },
        {
          "word": "purple box"
        },
        {
          "word": "red box"
        },
        {
          "word": "white box"
        },
        {
          "word": "yellow box"
        }
      ],
      "glosses": [
        "A modified DTMF box that adds four additional keys, creating a four-column-by-four-key grid."
      ],
      "id": "en-silver_box-en-noun-p6KWVgf8",
      "links": [
        [
          "telephony",
          "telephony"
        ],
        [
          "DTMF",
          "DTMF"
        ]
      ],
      "raw_glosses": [
        "(telephony) A modified DTMF box that adds four additional keys, creating a four-column-by-four-key grid."
      ],
      "topics": [
        "communications",
        "electrical-engineering",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "telecommunications",
        "telephony"
      ],
      "wikipedia": [
        "gray-box testing",
        "silver box",
        "white box (software engineering)"
      ]
    }
  ],
  "word": "silver box"
}

{
  "coordinate_terms": [
    {
      "word": "beige box"
    },
    {
      "word": "black box"
    },
    {
      "word": "blue box"
    },
    {
      "word": "brown box"
    },
    {
      "word": "gray box"
    },
    {
      "word": "green box"
    },
    {
      "word": "orange box"
    },
    {
      "word": "purple box"
    },
    {
      "word": "red box"
    },
    {
      "word": "white box"
    },
    {
      "word": "yellow box"
    }
  ],
  "forms": [
    {
      "form": "silver boxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "es"
      },
      "expansion": "silver box (plural silver boxes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English links with redundant wikilinks",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Telephony"
      ],
      "glosses": [
        "A modified DTMF box that adds four additional keys, creating a four-column-by-four-key grid."
      ],
      "links": [
        [
          "telephony",
          "telephony"
        ],
        [
          "DTMF",
          "DTMF"
        ]
      ],
      "raw_glosses": [
        "(telephony) A modified DTMF box that adds four additional keys, creating a four-column-by-four-key grid."
      ],
      "topics": [
        "communications",
        "electrical-engineering",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "telecommunications",
        "telephony"
      ],
      "wikipedia": [
        "gray-box testing",
        "silver box",
        "white box (software engineering)"
      ]
    }
  ],
  "word": "silver box"
}