"hard disk" meaning in English

{
  "etymology_text": "hard disk < → δείτε τις λέξεις hard και disk",
  "forms": [
    {
      "form": "hard disk",
      "source": "header"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Υλικό υπολογιστή (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "συντομογραφία: HD, HDD"
        }
      ],
      "glosses": [
        "ο σκληρός δίσκος"
      ],
      "id": "el-hard_disk-en-noun-FLyg~wcu",
      "raw_tags": [
        "υλικό υπολογιστή"
      ],
      "topics": [
        "computing"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "fixed disk"
    },
    {
      "word": "hard disc"
    },
    {
      "word": "''βρετανικό''"
    },
    {
      "word": "hard drive"
    },
    {
      "word": "hard disk drive"
    },
    {
      "word": "HDD"
    }
  ],
  "word": "hard disk"
}

{
  "etymology_text": "hard disk < → δείτε τις λέξεις hard και disk",
  "forms": [
    {
      "form": "hard disk",
      "source": "header"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Υλικό υπολογιστή (αγγλικά)"
      ],
      "examples": [
        {
          "text": "συντομογραφία: HD, HDD"
        }
      ],
      "glosses": [
        "ο σκληρός δίσκος"
      ],
      "raw_tags": [
        "υλικό υπολογιστή"
      ],
      "topics": [
        "computing"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "fixed disk"
    },
    {
      "word": "hard disc"
    },
    {
      "word": "''βρετανικό''"
    },
    {
      "word": "hard drive"
    },
    {
      "word": "hard disk drive"
    },
    {
      "word": "HDD"
    }
  ],
  "word": "hard disk"
}