"10K" meaning in English

{
  "forms": [
    {
      "form": "10Ks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "10K (plural 10Ks)",
      "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": "Entries with translation boxes",
          "parents": [],
          "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": "Athletics",
          "orig": "en:Athletics",
          "parents": [
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A road race over 10 000 metres."
      ],
      "id": "en-10K-en-noun-3HJ1gmvY",
      "links": [
        [
          "athletics",
          "athletics"
        ],
        [
          "road race",
          "road race"
        ],
        [
          "metres",
          "metres"
        ]
      ],
      "raw_glosses": [
        "(athletics) A road race over 10 000 metres."
      ],
      "topics": [
        "athletics",
        "hobbies",
        "lifestyle",
        "sports"
      ],
      "wikipedia": [
        "10K"
      ]
    }
  ],
  "word": "10K"
}

{
  "forms": [
    {
      "form": "10Ks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "10K (plural 10Ks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms spelled with numbers",
        "English words without vowels",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Athletics"
      ],
      "glosses": [
        "A road race over 10 000 metres."
      ],
      "links": [
        [
          "athletics",
          "athletics"
        ],
        [
          "road race",
          "road race"
        ],
        [
          "metres",
          "metres"
        ]
      ],
      "raw_glosses": [
        "(athletics) A road race over 10 000 metres."
      ],
      "topics": [
        "athletics",
        "hobbies",
        "lifestyle",
        "sports"
      ],
      "wikipedia": [
        "10K"
      ]
    }
  ],
  "word": "10K"
}