"dekameter" meaning in English

{
  "forms": [
    {
      "form": "dekameters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dekameter (plural dekameters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "decametre"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "SI units",
          "orig": "en:SI units",
          "parents": [
            "Units of measure",
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "dekametric"
        }
      ],
      "glosses": [
        "Alternative form of decametre"
      ],
      "id": "en-dekameter-en-noun-V37dkyPZ",
      "links": [
        [
          "decametre",
          "decametre#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈdɛkəmiːtə(ɹ)/",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "dekameter"
}

{
  "derived": [
    {
      "word": "dekametric"
    }
  ],
  "forms": [
    {
      "form": "dekameters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dekameter (plural dekameters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "decametre"
        }
      ],
      "categories": [
        "English 4-syllable words",
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English nouns",
        "English terms with IPA pronunciation",
        "en:SI units"
      ],
      "glosses": [
        "Alternative form of decametre"
      ],
      "links": [
        [
          "decametre",
          "decametre#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈdɛkəmiːtə(ɹ)/",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "dekameter"
}