"Baltijas jūra" meaning in Letton

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms propres en letton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Letton",
      "orig": "letton",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Letton",
  "lang_code": "lv",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "glosses": [
        "Mer Baltique."
      ],
      "id": "fr-Baltijas_jūra-lv-name-T1lblUDQ"
    }
  ],
  "word": "Baltijas jūra"
}

{
  "categories": [
    "Noms propres en letton",
    "letton"
  ],
  "lang": "Letton",
  "lang_code": "lv",
  "pos": "name",
  "pos_title": "Nom propre",
  "senses": [
    {
      "glosses": [
        "Mer Baltique."
      ]
    }
  ],
  "word": "Baltijas jūra"
}