"partial pin" meaning in English

{
  "forms": [
    {
      "form": "partial pins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "partial pin (plural partial pins)",
      "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": "topical",
          "langcode": "en",
          "name": "Chess",
          "orig": "en:Chess",
          "parents": [
            "Board games",
            "Tabletop games",
            "Games",
            "Recreation",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A pin where a rook or queen is pinned along a file, or a bishop or queen is pinned along a diagonal."
      ],
      "id": "en-partial_pin-en-noun-mKnnLcnz",
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "pin",
          "pin"
        ],
        [
          "rook",
          "rook"
        ],
        [
          "queen",
          "queen"
        ],
        [
          "file",
          "file"
        ],
        [
          "bishop",
          "bishop"
        ],
        [
          "diagonal",
          "diagonal"
        ]
      ],
      "raw_glosses": [
        "(chess) A pin where a rook or queen is pinned along a file, or a bishop or queen is pinned along a diagonal."
      ],
      "related": [
        {
          "word": "absolute pin"
        },
        {
          "word": "relative pin"
        }
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "partial pin"
}

{
  "forms": [
    {
      "form": "partial pins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "partial pin (plural partial pins)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "absolute pin"
    },
    {
      "word": "relative pin"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Chess"
      ],
      "glosses": [
        "A pin where a rook or queen is pinned along a file, or a bishop or queen is pinned along a diagonal."
      ],
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "pin",
          "pin"
        ],
        [
          "rook",
          "rook"
        ],
        [
          "queen",
          "queen"
        ],
        [
          "file",
          "file"
        ],
        [
          "bishop",
          "bishop"
        ],
        [
          "diagonal",
          "diagonal"
        ]
      ],
      "raw_glosses": [
        "(chess) A pin where a rook or queen is pinned along a file, or a bishop or queen is pinned along a diagonal."
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "partial pin"
}