"second-level domain" meaning in English

{
  "forms": [
    {
      "form": "second-level domains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "second-level domain (plural second-level domains)",
      "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": "Computing",
          "orig": "en:Computing",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Internet",
          "orig": "en:Internet",
          "parents": [
            "Computing",
            "Networking",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Wiktionary.org is a second-level domain, part of the org top-level domain."
        }
      ],
      "glosses": [
        "A domain that is immediately subordinate to a top-level domain (whose name appears after it, with a period separating the two)."
      ],
      "id": "en-second-level_domain-en-noun-vwtFKZRu",
      "links": [
        [
          "computing",
          "computing#Noun"
        ],
        [
          "Internet",
          "Internet"
        ],
        [
          "domain",
          "domain"
        ],
        [
          "subordinate",
          "subordinate"
        ],
        [
          "top-level domain",
          "top-level domain"
        ]
      ],
      "raw_glosses": [
        "(computing, Internet) A domain that is immediately subordinate to a top-level domain (whose name appears after it, with a period separating the two)."
      ],
      "tags": [
        "Internet"
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "translations": [
        {
          "code": "bg",
          "lang": "Bulgarian",
          "roman": "doméjn ot vtóro nivó",
          "sense": "subordinate domain",
          "tags": [
            "masculine"
          ],
          "word": "доме́йн от вто́ро ниво́"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "subordinate domain",
          "tags": [
            "feminine"
          ],
          "word": "domena drugiego poziomu"
        }
      ],
      "wikipedia": [
        "second-level domain"
      ]
    }
  ],
  "word": "second-level domain"
}

{
  "forms": [
    {
      "form": "second-level domains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "second-level domain (plural second-level domains)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Computing",
        "en:Internet"
      ],
      "examples": [
        {
          "text": "Wiktionary.org is a second-level domain, part of the org top-level domain."
        }
      ],
      "glosses": [
        "A domain that is immediately subordinate to a top-level domain (whose name appears after it, with a period separating the two)."
      ],
      "links": [
        [
          "computing",
          "computing#Noun"
        ],
        [
          "Internet",
          "Internet"
        ],
        [
          "domain",
          "domain"
        ],
        [
          "subordinate",
          "subordinate"
        ],
        [
          "top-level domain",
          "top-level domain"
        ]
      ],
      "raw_glosses": [
        "(computing, Internet) A domain that is immediately subordinate to a top-level domain (whose name appears after it, with a period separating the two)."
      ],
      "tags": [
        "Internet"
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "second-level domain"
      ]
    }
  ],
  "translations": [
    {
      "code": "bg",
      "lang": "Bulgarian",
      "roman": "doméjn ot vtóro nivó",
      "sense": "subordinate domain",
      "tags": [
        "masculine"
      ],
      "word": "доме́йн от вто́ро ниво́"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "subordinate domain",
      "tags": [
        "feminine"
      ],
      "word": "domena drugiego poziomu"
    }
  ],
  "word": "second-level domain"
}