"discrete metric" meaning in English

{
  "forms": [
    {
      "form": "discrete metrics",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "discrete metric (plural discrete metrics)",
      "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": "Mathematical analysis",
          "orig": "en:Mathematical analysis",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a metric d such that for any pair of points x and y, d(x,y)=0 if x=y and d(x,y)=1 if x ne y."
      ],
      "id": "en-discrete_metric-en-noun-mS52bgZ6",
      "links": [
        [
          "mathematical analysis",
          "mathematical analysis"
        ],
        [
          "metric",
          "metric"
        ]
      ],
      "raw_glosses": [
        "(mathematical analysis) a metric d such that for any pair of points x and y, d(x,y)=0 if x=y and d(x,y)=1 if x ne y."
      ],
      "related": [
        {
          "word": "discrete topology"
        },
        {
          "word": "trivial absolute value"
        }
      ],
      "topics": [
        "mathematical-analysis",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "discrete metric"
}

{
  "forms": [
    {
      "form": "discrete metrics",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "discrete metric (plural discrete metrics)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "discrete topology"
    },
    {
      "word": "trivial absolute value"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Mathematical analysis"
      ],
      "glosses": [
        "a metric d such that for any pair of points x and y, d(x,y)=0 if x=y and d(x,y)=1 if x ne y."
      ],
      "links": [
        [
          "mathematical analysis",
          "mathematical analysis"
        ],
        [
          "metric",
          "metric"
        ]
      ],
      "raw_glosses": [
        "(mathematical analysis) a metric d such that for any pair of points x and y, d(x,y)=0 if x=y and d(x,y)=1 if x ne y."
      ],
      "topics": [
        "mathematical-analysis",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "discrete metric"
}