"convention state" meaning in English

{
  "forms": [
    {
      "form": "convention states",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "convention state (plural convention states)",
      "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": "Philately",
          "orig": "en:Philately",
          "parents": [
            "Hobbies",
            "Recreation",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Any of the Indian feudal states which, during the time of the British Empire, used overprinted Indian stamps valid for postage outside the state."
      ],
      "id": "en-convention_state-en-noun-QzmcAKx7",
      "links": [
        [
          "philately",
          "philately"
        ],
        [
          "Indian",
          "Indian"
        ],
        [
          "feudal",
          "feudal"
        ],
        [
          "overprint",
          "overprint"
        ],
        [
          "valid",
          "valid"
        ],
        [
          "postage",
          "postage"
        ]
      ],
      "raw_glosses": [
        "(philately, historical) Any of the Indian feudal states which, during the time of the British Empire, used overprinted Indian stamps valid for postage outside the state."
      ],
      "related": [
        {
          "word": "feudatory state"
        }
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "philately"
      ]
    }
  ],
  "word": "convention state"
}

{
  "forms": [
    {
      "form": "convention states",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "convention state (plural convention states)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "feudatory state"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with historical senses",
        "en:Philately"
      ],
      "glosses": [
        "Any of the Indian feudal states which, during the time of the British Empire, used overprinted Indian stamps valid for postage outside the state."
      ],
      "links": [
        [
          "philately",
          "philately"
        ],
        [
          "Indian",
          "Indian"
        ],
        [
          "feudal",
          "feudal"
        ],
        [
          "overprint",
          "overprint"
        ],
        [
          "valid",
          "valid"
        ],
        [
          "postage",
          "postage"
        ]
      ],
      "raw_glosses": [
        "(philately, historical) Any of the Indian feudal states which, during the time of the British Empire, used overprinted Indian stamps valid for postage outside the state."
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "philately"
      ]
    }
  ],
  "word": "convention state"
}