"unch" meaning in English

{
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "unchecked square"
      },
      "expansion": "Clipping of unchecked square",
      "name": "clipping"
    }
  ],
  "etymology_text": "Clipping of unchecked square.",
  "forms": [
    {
      "form": "unches",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "unch (plural unches)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "ref": "1994 September 24, Ross Beresford <ross@bryson.demon.co.uk>, “symp10.zip - Crossword Grid Editor for MS Windows 3.1”, in comp.archives.msdos.announce (Usenet)",
          "roman": "o flagging of lights outside a configurable unch range",
          "text": "The Sympathy Crossword Grid Editor supports:\n...",
          "type": "quotation"
        },
        {
          "ref": "2005 November 17, Colin Blackburn <colin.blackburn@durham.ac.uk>, “Re: 75 Years of the Times Crossword - quick review”, in rec.puzzles.crosswords (Usenet)",
          "text": "From 1933 onwards the grids were standard grids. Then, for some reason, there was a blip in the late 1940s, a couple of the grids from that era had double unches and double checking.",
          "type": "quotation"
        },
        {
          "ref": "2006, Nikki Katz, Zen and the Art of Crossword Puzzles, Adams Media, pages 66–67",
          "text": "The bars and multitude of black squares are common in British puzzles because they allow unchecked letters (called unches)—or letters that don't need to cross with another answer.... There are rules regarding the unches, and traditionally every other letter in a solution should be checked with another letter.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An unchecked square: one that is part of only one entry (i.e., across or down, but not both)."
      ],
      "id": "en-unch-en-noun-FY1NtFJH",
      "links": [
        [
          "unchecked",
          "unchecked"
        ],
        [
          "square",
          "square"
        ],
        [
          "one",
          "one"
        ],
        [
          "entry",
          "entry"
        ],
        [
          "across",
          "across"
        ],
        [
          "down",
          "down"
        ],
        [
          "both",
          "both"
        ]
      ],
      "qualifier": "crossword puzzles",
      "raw_glosses": [
        "(crossword puzzles) An unchecked square: one that is part of only one entry (i.e., across or down, but not both)."
      ]
    }
  ],
  "word": "unch"
}

{
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "unchanged"
      },
      "expansion": "Clipping of unchanged",
      "name": "clipping"
    }
  ],
  "etymology_text": "Clipping of unchanged.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "unch (not comparable)",
      "name": "en-adjective"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "of a stock price: having closed at the same price at which it opened",
          "word": "unchanged"
        }
      ],
      "categories": [
        {
          "_dis": "64 36",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Abbreviation of unchanged (“of a stock price: having closed at the same price at which it opened”)."
      ],
      "id": "en-unch-en-adj-sZ9F25pc",
      "links": [
        [
          "unchanged",
          "unchanged#English"
        ],
        [
          "stock",
          "stock"
        ]
      ],
      "qualifier": "stock markets",
      "raw_glosses": [
        "(stock markets) Abbreviation of unchanged (“of a stock price: having closed at the same price at which it opened”)."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "not-comparable"
      ]
    }
  ],
  "word": "unch"
}

{
  "categories": [
    "English adjectives",
    "English clippings",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English uncomparable adjectives"
  ],
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "unchecked square"
      },
      "expansion": "Clipping of unchecked square",
      "name": "clipping"
    }
  ],
  "etymology_text": "Clipping of unchecked square.",
  "forms": [
    {
      "form": "unches",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "unch (plural unches)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1994 September 24, Ross Beresford <ross@bryson.demon.co.uk>, “symp10.zip - Crossword Grid Editor for MS Windows 3.1”, in comp.archives.msdos.announce (Usenet)",
          "roman": "o flagging of lights outside a configurable unch range",
          "text": "The Sympathy Crossword Grid Editor supports:\n...",
          "type": "quotation"
        },
        {
          "ref": "2005 November 17, Colin Blackburn <colin.blackburn@durham.ac.uk>, “Re: 75 Years of the Times Crossword - quick review”, in rec.puzzles.crosswords (Usenet)",
          "text": "From 1933 onwards the grids were standard grids. Then, for some reason, there was a blip in the late 1940s, a couple of the grids from that era had double unches and double checking.",
          "type": "quotation"
        },
        {
          "ref": "2006, Nikki Katz, Zen and the Art of Crossword Puzzles, Adams Media, pages 66–67",
          "text": "The bars and multitude of black squares are common in British puzzles because they allow unchecked letters (called unches)—or letters that don't need to cross with another answer.... There are rules regarding the unches, and traditionally every other letter in a solution should be checked with another letter.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An unchecked square: one that is part of only one entry (i.e., across or down, but not both)."
      ],
      "links": [
        [
          "unchecked",
          "unchecked"
        ],
        [
          "square",
          "square"
        ],
        [
          "one",
          "one"
        ],
        [
          "entry",
          "entry"
        ],
        [
          "across",
          "across"
        ],
        [
          "down",
          "down"
        ],
        [
          "both",
          "both"
        ]
      ],
      "qualifier": "crossword puzzles",
      "raw_glosses": [
        "(crossword puzzles) An unchecked square: one that is part of only one entry (i.e., across or down, but not both)."
      ]
    }
  ],
  "word": "unch"
}

{
  "categories": [
    "English adjectives",
    "English clippings",
    "English entries with incorrect language header",
    "English lemmas",
    "English uncomparable adjectives"
  ],
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "unchanged"
      },
      "expansion": "Clipping of unchanged",
      "name": "clipping"
    }
  ],
  "etymology_text": "Clipping of unchanged.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "unch (not comparable)",
      "name": "en-adjective"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "of a stock price: having closed at the same price at which it opened",
          "word": "unchanged"
        }
      ],
      "categories": [
        "English abbreviations"
      ],
      "glosses": [
        "Abbreviation of unchanged (“of a stock price: having closed at the same price at which it opened”)."
      ],
      "links": [
        [
          "unchanged",
          "unchanged#English"
        ],
        [
          "stock",
          "stock"
        ]
      ],
      "qualifier": "stock markets",
      "raw_glosses": [
        "(stock markets) Abbreviation of unchanged (“of a stock price: having closed at the same price at which it opened”)."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "not-comparable"
      ]
    }
  ],
  "word": "unch"
}