"scientific frontier" meaning in English

{
  "etymology_text": "The term was used by Lord Beaconsfield in 1878 in speaking of the rectification of the boundaries between India and Afghanistan.",
  "forms": [
    {
      "form": "scientific frontiers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "scientific frontier (plural scientific frontiers)",
      "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"
        }
      ],
      "glosses": [
        "A geographical frontier capable of being occupied and defended in a strategic manner, rather than haphazardly."
      ],
      "id": "en-scientific_frontier-en-noun-4DVDq5us",
      "links": [
        [
          "geographical",
          "geographical"
        ],
        [
          "frontier",
          "frontier"
        ],
        [
          "strategic",
          "strategic"
        ],
        [
          "haphazard",
          "haphazard"
        ]
      ]
    }
  ],
  "word": "scientific frontier"
}

{
  "etymology_text": "The term was used by Lord Beaconsfield in 1878 in speaking of the rectification of the boundaries between India and Afghanistan.",
  "forms": [
    {
      "form": "scientific frontiers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "scientific frontier (plural scientific frontiers)",
      "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"
      ],
      "glosses": [
        "A geographical frontier capable of being occupied and defended in a strategic manner, rather than haphazardly."
      ],
      "links": [
        [
          "geographical",
          "geographical"
        ],
        [
          "frontier",
          "frontier"
        ],
        [
          "strategic",
          "strategic"
        ],
        [
          "haphazard",
          "haphazard"
        ]
      ]
    }
  ],
  "word": "scientific frontier"
}