"broken in" meaning in English

{
  "forms": [
    {
      "form": "more broken in",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most broken in",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "more",
        "sup": "broken in"
      },
      "expansion": "broken in (not generally comparable, comparative more broken in, superlative most broken in)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Engineering",
          "orig": "en:Engineering",
          "parents": [
            "Applied sciences",
            "Technology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "The engine should be well broken in before its heavy working life begins.",
          "type": "example"
        }
      ],
      "glosses": [
        "(sometimes comparative) Having been broken in to seat the parts."
      ],
      "id": "en-broken_in-en-adj-mtiGZHqk",
      "links": [
        [
          "engineering",
          "engineering#Noun"
        ],
        [
          "broken in",
          "#Verb"
        ]
      ],
      "raw_glosses": [
        "(participial adjective; mechanical, engineering) (sometimes comparative) Having been broken in to seat the parts."
      ],
      "synonyms": [
        {
          "word": "run in"
        }
      ],
      "tags": [
        "adjective",
        "error-misspelling",
        "not-comparable",
        "participle",
        "usually"
      ],
      "topics": [
        "engineering",
        "mechanical",
        "mechanical-engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "broken in"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "broken in",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "30 70",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "word": "break in"
        }
      ],
      "glosses": [
        "past participle of break in"
      ],
      "id": "en-broken_in-en-verb-CQ4g53P5",
      "links": [
        [
          "break in",
          "break in#English"
        ]
      ],
      "tags": [
        "form-of",
        "participle",
        "past"
      ]
    }
  ],
  "word": "broken in"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English non-lemma forms",
    "English verb forms"
  ],
  "forms": [
    {
      "form": "more broken in",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most broken in",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "more",
        "sup": "broken in"
      },
      "expansion": "broken in (not generally comparable, comparative more broken in, superlative most broken in)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English terms with usage examples",
        "en:Engineering"
      ],
      "examples": [
        {
          "text": "The engine should be well broken in before its heavy working life begins.",
          "type": "example"
        }
      ],
      "glosses": [
        "(sometimes comparative) Having been broken in to seat the parts."
      ],
      "links": [
        [
          "engineering",
          "engineering#Noun"
        ],
        [
          "broken in",
          "#Verb"
        ]
      ],
      "raw_glosses": [
        "(participial adjective; mechanical, engineering) (sometimes comparative) Having been broken in to seat the parts."
      ],
      "synonyms": [
        {
          "word": "run in"
        }
      ],
      "tags": [
        "adjective",
        "error-misspelling",
        "not-comparable",
        "participle",
        "usually"
      ],
      "topics": [
        "engineering",
        "mechanical",
        "mechanical-engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "broken in"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English non-lemma forms",
    "English verb forms"
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "broken in",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
        {
          "word": "break in"
        }
      ],
      "glosses": [
        "past participle of break in"
      ],
      "links": [
        [
          "break in",
          "break in#English"
        ]
      ],
      "tags": [
        "form-of",
        "participle",
        "past"
      ]
    }
  ],
  "word": "broken in"
}