"planetbound" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "planet",
        "3": "bound"
      },
      "expansion": "planet + -bound",
      "name": "suffix"
    }
  ],
  "etymology_text": "planet + -bound",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "planetbound (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "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 suffixed with -bound",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1953 July 25, George O. Smith, Space Science Fiction, page 94",
          "text": "I'll bet a hat that Isaac Asimov could knock us all for a row of uranium cans if he wrote about something a leetle more familiar to us poor planet-bound humans. This massive sweep of millions of light years and thousands of centuries away was hot stuff fifteen years ago. Isaac, please come home, all is forgiven.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Unable to leave the planet one is on."
      ],
      "id": "en-planetbound-en-adj-gt-vIgju",
      "links": [
        [
          "planet",
          "planet"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "planetbound"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "planet",
        "3": "bound"
      },
      "expansion": "planet + -bound",
      "name": "suffix"
    }
  ],
  "etymology_text": "planet + -bound",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "planetbound (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms suffixed with -bound",
        "English terms with quotations",
        "English uncomparable adjectives"
      ],
      "examples": [
        {
          "ref": "1953 July 25, George O. Smith, Space Science Fiction, page 94",
          "text": "I'll bet a hat that Isaac Asimov could knock us all for a row of uranium cans if he wrote about something a leetle more familiar to us poor planet-bound humans. This massive sweep of millions of light years and thousands of centuries away was hot stuff fifteen years ago. Isaac, please come home, all is forgiven.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Unable to leave the planet one is on."
      ],
      "links": [
        [
          "planet",
          "planet"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "planetbound"
}