"ona llarga" meaning in Catalan

{
  "forms": [
    {
      "form": "ones llargues",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "head": "ona llarga"
      },
      "expansion": "ona llarga f (plural ones llargues)",
      "name": "ca-noun"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Catalan entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ca",
          "name": "Radio",
          "orig": "ca:Radio",
          "parents": [
            "Telecommunications",
            "Communication",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "longwave"
      ],
      "id": "en-ona_llarga-ca-noun-vz8MZxxz",
      "links": [
        [
          "longwave",
          "longwave"
        ]
      ],
      "related": [
        {
          "word": "ona de ràdio"
        },
        {
          "word": "ona curta"
        },
        {
          "word": "ona mitjana"
        }
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "ona llarga"
}

{
  "forms": [
    {
      "form": "ones llargues",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f",
        "head": "ona llarga"
      },
      "expansion": "ona llarga f (plural ones llargues)",
      "name": "ca-noun"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "noun",
  "related": [
    {
      "word": "ona de ràdio"
    },
    {
      "word": "ona curta"
    },
    {
      "word": "ona mitjana"
    }
  ],
  "senses": [
    {
      "categories": [
        "Catalan countable nouns",
        "Catalan entries with incorrect language header",
        "Catalan feminine nouns",
        "Catalan lemmas",
        "Catalan multiword terms",
        "Catalan nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "ca:Radio"
      ],
      "glosses": [
        "longwave"
      ],
      "links": [
        [
          "longwave",
          "longwave"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "ona llarga"
}