"partial sum" meaning in English

{
  "forms": [
    {
      "form": "partial sums",
      "tags": [
        "plural"
      ]
    }
  ],
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    {
      "args": {},
      "expansion": "partial sum (plural partial sums)",
      "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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          "kind": "topical",
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          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
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        }
      ],
      "glosses": [
        "The sum of the first n terms of an infinite series, where n is a finite number."
      ],
      "id": "en-partial_sum-en-noun-DDSWeqT4",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "infinite series",
          "infinite series"
        ],
        [
          "finite",
          "finite"
        ]
      ],
      "raw_glosses": [
        "(mathematics) The sum of the first n terms of an infinite series, where n is a finite number."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "the sum of the first n terms",
          "word": "osasumma"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "the sum of the first n terms",
          "tags": [
            "feminine"
          ],
          "word": "somme partielle"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "the sum of the first n terms",
          "tags": [
            "feminine"
          ],
          "word": "suma częściowa"
        },
        {
          "code": "tl",
          "lang": "Tagalog",
          "sense": "the sum of the first n terms",
          "word": "bahaging dagup"
        }
      ]
    }
  ],
  "word": "partial sum"
}

{
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    {
      "form": "partial sums",
      "tags": [
        "plural"
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    }
  ],
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      "expansion": "partial sum (plural partial sums)",
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  "lang_code": "en",
  "pos": "noun",
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        "Terms with Polish translations",
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      "glosses": [
        "The sum of the first n terms of an infinite series, where n is a finite number."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "infinite series",
          "infinite series"
        ],
        [
          "finite",
          "finite"
        ]
      ],
      "raw_glosses": [
        "(mathematics) The sum of the first n terms of an infinite series, where n is a finite number."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "the sum of the first n terms",
      "word": "osasumma"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "the sum of the first n terms",
      "tags": [
        "feminine"
      ],
      "word": "somme partielle"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "the sum of the first n terms",
      "tags": [
        "feminine"
      ],
      "word": "suma częściowa"
    },
    {
      "code": "tl",
      "lang": "Tagalog",
      "sense": "the sum of the first n terms",
      "word": "bahaging dagup"
    }
  ],
  "word": "partial sum"
}