"pp" meaning in Translingual

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "adverb",
        "head": "pp"
      },
      "expansion": "pp",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "adv",
  "senses": [
    {
      "glosses": [
        "pianissimo"
      ],
      "id": "en-pp-mul-adv-qA2CER9X",
      "links": [
        [
          "pianissimo",
          "pianissimo"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "31 69",
          "kind": "other",
          "name": "Musical symbols",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "8 92",
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "per procurationem - Latin for by agency or by proxy - used on a letter to indicate that has been signed on somebody else's behalf."
      ],
      "id": "en-pp-mul-adv-5VGd9hEU",
      "links": [
        [
          "agency",
          "agency"
        ],
        [
          "proxy",
          "proxy"
        ]
      ]
    }
  ],
  "word": "pp"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English pluralia tantum",
    "English uncountable nouns",
    "English words without vowels",
    "Musical symbols",
    "Pages with 2 entries",
    "Pages with entries",
    "Translingual adverbs",
    "Translingual entries with incorrect language header",
    "Translingual lemmas"
  ],
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "adverb",
        "head": "pp"
      },
      "expansion": "pp",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "adv",
  "senses": [
    {
      "glosses": [
        "pianissimo"
      ],
      "links": [
        [
          "pianissimo",
          "pianissimo"
        ]
      ]
    },
    {
      "glosses": [
        "per procurationem - Latin for by agency or by proxy - used on a letter to indicate that has been signed on somebody else's behalf."
      ],
      "links": [
        [
          "agency",
          "agency"
        ],
        [
          "proxy",
          "proxy"
        ]
      ]
    }
  ],
  "word": "pp"
}