"O/O" meaning in English

{
  "forms": [
    {
      "form": "O",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "O (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 reduplicated coordinated pairs",
          "parents": [
            "Reduplicated coordinated pairs",
            "Coordinated pairs",
            "Reduplications",
            "Terms by etymology"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nautical",
          "orig": "en:Nautical",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "O"
        },
        {
          "word": "O carrier"
        }
      ],
      "glosses": [
        "ore/oil ; designating that a ship can carry both ore and oil"
      ],
      "id": "en-O/O-en-adj-GqNpIpix",
      "links": [
        [
          "nautical",
          "nautical"
        ],
        [
          "ore",
          "ore"
        ],
        [
          "oil",
          "oil"
        ]
      ],
      "raw_glosses": [
        "(nautical) ore/oil ; designating that a ship can carry both ore and oil"
      ],
      "related": [
        {
          "word": "OBO"
        },
        {
          "word": "BIBO"
        },
        {
          "word": "ore"
        },
        {
          "word": "oil carrier"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "nautical",
        "transport"
      ]
    }
  ],
  "word": "O/O"
}

{
  "derived": [
    {
      "word": "O"
    },
    {
      "word": "O carrier"
    }
  ],
  "forms": [
    {
      "form": "O",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "O (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "OBO"
    },
    {
      "word": "BIBO"
    },
    {
      "word": "ore"
    },
    {
      "word": "oil carrier"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English reduplicated coordinated pairs",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Nautical"
      ],
      "glosses": [
        "ore/oil ; designating that a ship can carry both ore and oil"
      ],
      "links": [
        [
          "nautical",
          "nautical"
        ],
        [
          "ore",
          "ore"
        ],
        [
          "oil",
          "oil"
        ]
      ],
      "raw_glosses": [
        "(nautical) ore/oil ; designating that a ship can carry both ore and oil"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "nautical",
        "transport"
      ]
    }
  ],
  "word": "O/O"
}