"purple box" meaning in English

{
  "forms": [
    {
      "form": "purple boxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "purple box (plural purple 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"
        }
      ],
      "coordinate_terms": [
        {
          "word": "beige box"
        },
        {
          "word": "black box"
        },
        {
          "word": "blue box"
        },
        {
          "word": "brown box"
        },
        {
          "word": "gray box"
        },
        {
          "word": "green box"
        },
        {
          "word": "orange box"
        },
        {
          "word": "red box"
        },
        {
          "word": "silver box"
        },
        {
          "word": "white box"
        },
        {
          "word": "yellow box"
        }
      ],
      "glosses": [
        "A device used in phreaking that adds a hold facility to a telephone line."
      ],
      "id": "en-purple_box-en-noun-4NcMWT8v",
      "links": [
        [
          "device",
          "device"
        ],
        [
          "phreaking",
          "phreaking"
        ],
        [
          "hold",
          "hold"
        ],
        [
          "telephone line",
          "telephone line"
        ]
      ],
      "wikipedia": [
        "gray-box testing",
        "white box (software engineering)"
      ]
    }
  ],
  "word": "purple 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": "red box"
    },
    {
      "word": "silver box"
    },
    {
      "word": "white box"
    },
    {
      "word": "yellow box"
    }
  ],
  "forms": [
    {
      "form": "purple boxes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "purple box (plural purple 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"
      ],
      "glosses": [
        "A device used in phreaking that adds a hold facility to a telephone line."
      ],
      "links": [
        [
          "device",
          "device"
        ],
        [
          "phreaking",
          "phreaking"
        ],
        [
          "hold",
          "hold"
        ],
        [
          "telephone line",
          "telephone line"
        ]
      ],
      "wikipedia": [
        "gray-box testing",
        "white box (software engineering)"
      ]
    }
  ],
  "word": "purple box"
}