"back forty" meaning in English

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      "expansion": "back + forty",
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  "etymology_text": "From back + forty, meaning “back side of a farm”. In the Homestead Acts (1860s–), farmers were granted a quarter section; a section was nominally 1 square mile containing 640 acres, a quarter section was 160 acres, and the quarter section was itself subdivided into four quarter-quarter sections of 40 acres each: two front forty and two back forty. Compare north forty, back of beyond, backcountry, and backwater.",
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    {
      "form": "back forties",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "examples": [
        {
          "text": "They couldn't contact the farmer right away because he was out plowing the back forty",
          "type": "example"
        }
      ],
      "glosses": [
        "The remote part of a farm."
      ],
      "id": "en-back_forty-en-noun-bmMBfdrg",
      "raw_glosses": [
        "(US) The remote part of a farm."
      ],
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        "US"
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          "_dis": "41 59",
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      "glosses": [
        "The most remote or inaccessible part of any place."
      ],
      "id": "en-back_forty-en-noun-C46mHafE",
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        "(US, idiomatic) The most remote or inaccessible part of any place."
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    {
      "_dis1": "49 51",
      "sense": "remote place",
      "word": "See: Thesaurus:remote place"
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  ],
  "wikipedia": [
    "Homestead Acts"
  ],
  "word": "back forty"
}

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  ],
  "etymology_text": "From back + forty, meaning “back side of a farm”. In the Homestead Acts (1860s–), farmers were granted a quarter section; a section was nominally 1 square mile containing 640 acres, a quarter section was 160 acres, and the quarter section was itself subdivided into four quarter-quarter sections of 40 acres each: two front forty and two back forty. Compare north forty, back of beyond, backcountry, and backwater.",
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    {
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  "lang_code": "en",
  "pos": "noun",
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        {
          "text": "They couldn't contact the farmer right away because he was out plowing the back forty",
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        "The remote part of a farm."
      ],
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        "(US) The remote part of a farm."
      ],
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        "US"
      ]
    },
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        "English idioms"
      ],
      "glosses": [
        "The most remote or inaccessible part of any place."
      ],
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        "(US, idiomatic) The most remote or inaccessible part of any place."
      ],
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      "sense": "remote place",
      "word": "See: Thesaurus:remote place"
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  "word": "back forty"
}