"マイルストーン" meaning in Japanese

{
  "etymology_templates": [
    {
      "args": {
        "1": "ja",
        "2": "en",
        "3": "milestone"
      },
      "expansion": "English milestone",
      "name": "bor"
    }
  ],
  "etymology_text": "From English milestone.",
  "forms": [
    {
      "form": "mairusutōn",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "マイルストーン • (mairusutōn)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese katakana",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "milestone, one of a series of numbered markers placed along a road at regular intervals"
      ],
      "id": "en-マイルストーン-ja-noun-3nzW-Vdy",
      "links": [
        [
          "milestone",
          "milestone"
        ]
      ],
      "wikipedia": [
        "ja:マイルストーン"
      ]
    }
  ],
  "word": "マイルストーン"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ja",
        "2": "en",
        "3": "milestone"
      },
      "expansion": "English milestone",
      "name": "bor"
    }
  ],
  "etymology_text": "From English milestone.",
  "forms": [
    {
      "form": "mairusutōn",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "マイルストーン • (mairusutōn)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese katakana",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms borrowed from English",
        "Japanese terms derived from English",
        "Japanese terms with redundant sortkeys"
      ],
      "glosses": [
        "milestone, one of a series of numbered markers placed along a road at regular intervals"
      ],
      "links": [
        [
          "milestone",
          "milestone"
        ]
      ],
      "wikipedia": [
        "ja:マイルストーン"
      ]
    }
  ],
  "word": "マイルストーン"
}