"substar" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "star"
      },
      "expansion": "sub- + star",
      "name": "prefix"
    }
  ],
  "etymology_text": "sub- + star",
  "forms": [
    {
      "form": "substars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "substar (plural substars)",
      "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": "English terms prefixed with sub-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Astronomy",
          "orig": "en:Astronomy",
          "parents": [
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Astrophysics",
          "orig": "en:Astrophysics",
          "parents": [
            "Astronomy",
            "Physics",
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Celestial bodies",
          "orig": "en:Celestial bodies",
          "parents": [
            "Space",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nuclear fusion",
          "orig": "en:Nuclear fusion",
          "parents": [
            "Nuclear energy",
            "Energy",
            "Nuclear physics",
            "Technology",
            "Nature",
            "Physics",
            "Quantum mechanics",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A substellar object."
      ],
      "id": "en-substar-en-noun-hoPOExJk",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "substellar",
          "substellar"
        ],
        [
          "object",
          "object"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A substellar object."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "word": "substar"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "star"
      },
      "expansion": "sub- + star",
      "name": "prefix"
    }
  ],
  "etymology_text": "sub- + star",
  "forms": [
    {
      "form": "substars",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "substar (plural substars)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with sub-",
        "en:Astronomy",
        "en:Astrophysics",
        "en:Celestial bodies",
        "en:Nuclear fusion"
      ],
      "glosses": [
        "A substellar object."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "substellar",
          "substellar"
        ],
        [
          "object",
          "object"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A substellar object."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "word": "substar"
}