"P1" meaning in English

{
  "forms": [
    {
      "form": "P1s",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "P1 (plural P1s)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "A common abbreviation used in motorsport to signify the frontmost starting position.",
          "word": "position one"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Qualifying went well the other day, I qualified P1.",
          "type": "example"
        },
        {
          "text": "He scored several P1s throughout the season.",
          "type": "example"
        }
      ],
      "glosses": [
        "Abbreviation of position one. (A common abbreviation used in motorsport to signify the frontmost starting position.)"
      ],
      "id": "en-P1-en-noun-Ho5QccsZ",
      "links": [
        [
          "position one",
          "position one#English"
        ]
      ],
      "related": [
        {
          "word": "pole position"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "P1"
}

{
  "forms": [
    {
      "form": "P1s",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "P1 (plural P1s)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "pole position"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "extra": "A common abbreviation used in motorsport to signify the frontmost starting position.",
          "word": "position one"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms spelled with numbers",
        "English terms with usage examples",
        "English words without vowels"
      ],
      "examples": [
        {
          "text": "Qualifying went well the other day, I qualified P1.",
          "type": "example"
        },
        {
          "text": "He scored several P1s throughout the season.",
          "type": "example"
        }
      ],
      "glosses": [
        "Abbreviation of position one. (A common abbreviation used in motorsport to signify the frontmost starting position.)"
      ],
      "links": [
        [
          "position one",
          "position one#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "P1"
}