"sparse table" meaning in English

{
  "forms": [
    {
      "form": "sparse tables",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sparse table (plural sparse tables)",
      "name": "en-noun"
    }
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  "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"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Computer science",
          "orig": "en:Computer science",
          "parents": [
            "Computing",
            "Sciences",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A data structure that can answer range maximum or range minimum queries on an immutable list of values in constant time, and other range queries in logarithmic time."
      ],
      "id": "en-sparse_table-en-noun-p2Jxh1qt",
      "links": [
        [
          "computer science",
          "computer science"
        ],
        [
          "data structure",
          "data structure"
        ],
        [
          "constant",
          "constant"
        ],
        [
          "logarithmic",
          "logarithmic"
        ]
      ],
      "raw_glosses": [
        "(computer science) A data structure that can answer range maximum or range minimum queries on an immutable list of values in constant time, and other range queries in logarithmic time."
      ],
      "topics": [
        "computer",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "science",
        "sciences"
      ]
    }
  ],
  "word": "sparse table"
}

{
  "forms": [
    {
      "form": "sparse tables",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sparse table (plural sparse tables)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Computer science"
      ],
      "glosses": [
        "A data structure that can answer range maximum or range minimum queries on an immutable list of values in constant time, and other range queries in logarithmic time."
      ],
      "links": [
        [
          "computer science",
          "computer science"
        ],
        [
          "data structure",
          "data structure"
        ],
        [
          "constant",
          "constant"
        ],
        [
          "logarithmic",
          "logarithmic"
        ]
      ],
      "raw_glosses": [
        "(computer science) A data structure that can answer range maximum or range minimum queries on an immutable list of values in constant time, and other range queries in logarithmic time."
      ],
      "topics": [
        "computer",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "science",
        "sciences"
      ]
    }
  ],
  "word": "sparse table"
}