"dekad" meaning in English

{
  "forms": [
    {
      "form": "dekads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dekad (plural dekads)",
      "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": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Africa InterTropical Front (ITF), in Climate Prediction Center)"
        },
        {
          "text": "Figure 1 displays the current position of the ITF relative to the long-term average position during the 3rd dekad of April and its previous position during the 2nd dekad of April.",
          "type": "example"
        }
      ],
      "glosses": [
        "ten days, especially of rainfall; see adjective form dekadal"
      ],
      "id": "en-dekad-en-noun-K0dyYZfY",
      "links": [
        [
          "dekadal",
          "dekadal"
        ]
      ],
      "related": [
        {
          "word": "pentad"
        }
      ]
    }
  ],
  "word": "dekad"
}

{
  "forms": [
    {
      "form": "dekads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dekad (plural dekads)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "pentad"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with usage examples",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Africa InterTropical Front (ITF), in Climate Prediction Center)"
        },
        {
          "text": "Figure 1 displays the current position of the ITF relative to the long-term average position during the 3rd dekad of April and its previous position during the 2nd dekad of April.",
          "type": "example"
        }
      ],
      "glosses": [
        "ten days, especially of rainfall; see adjective form dekadal"
      ],
      "links": [
        [
          "dekadal",
          "dekadal"
        ]
      ]
    }
  ],
  "word": "dekad"
}