"common seal" meaning in English

{
  "forms": [
    {
      "form": "common seals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "common seal (plural common seals)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "parents": [],
          "source": "w"
        },
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          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Phocid seals",
          "orig": "en:Phocid seals",
          "parents": [
            "Pinnipeds",
            "Carnivores",
            "Mammals",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
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          "source": "w"
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      ],
      "glosses": [
        "Phoca vitulina, a seal living in the northern Atlantic and Pacific oceans."
      ],
      "id": "en-common_seal-en-noun-7uVez9HQ",
      "links": [
        [
          "Phoca vitulina",
          "Phoca vitulina#Translingual"
        ],
        [
          "seal",
          "seal"
        ],
        [
          "Atlantic",
          "Atlantic"
        ],
        [
          "Pacific",
          "Pacific"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "US"
          ],
          "word": "harbor seal"
        },
        {
          "tags": [
            "Canada"
          ],
          "word": "harbour seal"
        },
        {
          "word": "sea calf"
        }
      ],
      "wikipedia": [
        "Harbor seal"
      ]
    }
  ],
  "word": "common seal"
}

{
  "forms": [
    {
      "form": "common seals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "common seal (plural common seals)",
      "name": "en-noun"
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  "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",
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        "en:Phocid seals"
      ],
      "glosses": [
        "Phoca vitulina, a seal living in the northern Atlantic and Pacific oceans."
      ],
      "links": [
        [
          "Phoca vitulina",
          "Phoca vitulina#Translingual"
        ],
        [
          "seal",
          "seal"
        ],
        [
          "Atlantic",
          "Atlantic"
        ],
        [
          "Pacific",
          "Pacific"
        ]
      ],
      "wikipedia": [
        "Harbor seal"
      ]
    }
  ],
  "synonyms": [
    {
      "tags": [
        "US"
      ],
      "word": "harbor seal"
    },
    {
      "tags": [
        "Canada"
      ],
      "word": "harbour seal"
    },
    {
      "word": "sea calf"
    }
  ],
  "word": "common seal"
}