"res nullius" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "rēs nūllīus",
        "4": "",
        "5": "nobody's thing"
      },
      "expansion": "Latin rēs nūllīus (“nobody's thing”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin rēs nūllīus (“nobody's thing”).",
  "head_templates": [
    {
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      "expansion": "res nullius",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Law",
          "orig": "en:Law",
          "parents": [
            "Justice",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "terra nullius"
        }
      ],
      "glosses": [
        "Something that has no owner and is not subject to the jurisdiction of any state, but is susceptible to national appropriation."
      ],
      "id": "en-res_nullius-en-noun-AztsFfOH",
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "jurisdiction",
          "jurisdiction"
        ],
        [
          "susceptible",
          "susceptible"
        ],
        [
          "appropriation",
          "appropriation"
        ]
      ],
      "raw_glosses": [
        "(law) Something that has no owner and is not subject to the jurisdiction of any state, but is susceptible to national appropriation."
      ],
      "topics": [
        "law"
      ]
    }
  ],
  "word": "res nullius"
}

{
  "coordinate_terms": [
    {
      "word": "terra nullius"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "rēs nūllīus",
        "4": "",
        "5": "nobody's thing"
      },
      "expansion": "Latin rēs nūllīus (“nobody's thing”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin rēs nūllīus (“nobody's thing”).",
  "head_templates": [
    {
      "args": {
        "1": "?",
        "nolinkhead": "1"
      },
      "expansion": "res nullius",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "Something that has no owner and is not subject to the jurisdiction of any state, but is susceptible to national appropriation."
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      "raw_glosses": [
        "(law) Something that has no owner and is not subject to the jurisdiction of any state, but is susceptible to national appropriation."
      ],
      "topics": [
        "law"
      ]
    }
  ],
  "word": "res nullius"
}