"baltic" meaning in English

{
  "forms": [
    {
      "form": "more baltic",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most baltic",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "baltic (comparative more baltic, superlative most baltic)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "very cold",
          "word": "Baltic"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2012, Craig Robertson, Cold Grave, →ISBN:",
          "text": "'We're staying out at the Lake of Menteith and it's baltic out there. They reckon the lake could freeze over again if this weather gets worse.'",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative letter-case form of Baltic (“very cold”)"
      ],
      "id": "en-baltic-en-adj-6QtDnxDF",
      "links": [
        [
          "Baltic",
          "Baltic#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "baltic"
}

{
  "forms": [
    {
      "form": "more baltic",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most baltic",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "baltic (comparative more baltic, superlative most baltic)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "very cold",
          "word": "Baltic"
        }
      ],
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms with quotations",
        "Pages with 3 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2012, Craig Robertson, Cold Grave, →ISBN:",
          "text": "'We're staying out at the Lake of Menteith and it's baltic out there. They reckon the lake could freeze over again if this weather gets worse.'",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative letter-case form of Baltic (“very cold”)"
      ],
      "links": [
        [
          "Baltic",
          "Baltic#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "baltic"
}