"sum of best" meaning in English

{
  "forms": [
    {
      "form": "sums of best",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sums of best"
      },
      "expansion": "sum of best (plural sums of best)",
      "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": "Speedrunning",
          "orig": "en:Speedrunning",
          "parents": [
            "Video games",
            "Games",
            "Mass media",
            "Software",
            "Recreation",
            "Culture",
            "Media",
            "Computing",
            "Human activity",
            "Society",
            "Communication",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "The runner's final time in the record-breaking speedrun was even faster than her previous sum of best.",
          "type": "example"
        }
      ],
      "glosses": [
        "The total combined time of the fastest segments or splits achieved in a speedrun of a video game, representing the theoretical fastest time that a speedrunner could achieve at their current level of skill."
      ],
      "id": "en-sum_of_best-en-noun-l99NKw3y",
      "links": [
        [
          "speedrunning",
          "speedrunning"
        ],
        [
          "speedrun",
          "speedrun#Noun"
        ],
        [
          "video game",
          "video game#Noun"
        ]
      ],
      "raw_glosses": [
        "(speedrunning) The total combined time of the fastest segments or splits achieved in a speedrun of a video game, representing the theoretical fastest time that a speedrunner could achieve at their current level of skill."
      ],
      "related": [
        {
          "word": "personal best"
        },
        {
          "word": "segment"
        },
        {
          "word": "speedrun"
        }
      ]
    }
  ],
  "word": "sum of best"
}

{
  "forms": [
    {
      "form": "sums of best",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sums of best"
      },
      "expansion": "sum of best (plural sums of best)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "personal best"
    },
    {
      "word": "segment"
    },
    {
      "word": "speedrun"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with usage examples",
        "en:Speedrunning"
      ],
      "examples": [
        {
          "text": "The runner's final time in the record-breaking speedrun was even faster than her previous sum of best.",
          "type": "example"
        }
      ],
      "glosses": [
        "The total combined time of the fastest segments or splits achieved in a speedrun of a video game, representing the theoretical fastest time that a speedrunner could achieve at their current level of skill."
      ],
      "links": [
        [
          "speedrunning",
          "speedrunning"
        ],
        [
          "speedrun",
          "speedrun#Noun"
        ],
        [
          "video game",
          "video game#Noun"
        ]
      ],
      "raw_glosses": [
        "(speedrunning) The total combined time of the fastest segments or splits achieved in a speedrun of a video game, representing the theoretical fastest time that a speedrunner could achieve at their current level of skill."
      ]
    }
  ],
  "word": "sum of best"
}