"P. J." meaning in French

{
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "P. J. f",
      "name": "fr-proper noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "police judiciaire"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Law enforcement",
          "orig": "fr:Law enforcement",
          "parents": [
            "Crime prevention",
            "Emergency services",
            "Law",
            "Crime",
            "Public safety",
            "Justice",
            "Criminal law",
            "Society",
            "Public administration",
            "Security",
            "All topics",
            "Government",
            "Fundamental",
            "Politics"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of police judiciaire."
      ],
      "id": "en-P._J.-fr-name-uv2uwHYm",
      "links": [
        [
          "police judiciaire",
          "police judiciaire#French"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "feminine",
        "initialism"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pe.ʒi/"
    }
  ],
  "word": "P. J."
}

{
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "P. J. f",
      "name": "fr-proper noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "word": "police judiciaire"
        }
      ],
      "categories": [
        "French 2-syllable words",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French initialisms",
        "French lemmas",
        "French multiword terms",
        "French proper nouns",
        "French terms spelled with .",
        "French terms with IPA pronunciation",
        "Pages with 1 entry",
        "fr:Law enforcement"
      ],
      "glosses": [
        "Initialism of police judiciaire."
      ],
      "links": [
        [
          "police judiciaire",
          "police judiciaire#French"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "feminine",
        "initialism"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/pe.ʒi/"
    }
  ],
  "word": "P. J."
}