"booster shot" meaning in English

{
  "forms": [
    {
      "form": "booster shots",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "booster shot (plural booster shots)",
      "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Immunology",
          "orig": "en:Immunology",
          "parents": [
            "Medicine",
            "Biology",
            "Healthcare",
            "Sciences",
            "Health",
            "All topics",
            "Body",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Pharmaceutical drugs",
          "orig": "en:Pharmaceutical drugs",
          "parents": [
            "Drugs",
            "Matter",
            "Pharmacology",
            "Chemistry",
            "Nature",
            "Biochemistry",
            "Medicine",
            "Sciences",
            "All topics",
            "Biology",
            "Healthcare",
            "Fundamental",
            "Health",
            "Body"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A dose of an antigen (usually a vaccine) designed to strengthen immunity after an earlier immunizing dose."
      ],
      "id": "en-booster_shot-en-noun-QVNlM-G5",
      "links": [
        [
          "dose",
          "dose"
        ],
        [
          "antigen",
          "antigen"
        ],
        [
          "vaccine",
          "vaccine"
        ],
        [
          "strengthen",
          "strengthen"
        ],
        [
          "immunity",
          "immunity"
        ],
        [
          "immunizing",
          "immunizing"
        ]
      ],
      "synonyms": [
        {
          "word": "booster dose"
        },
        {
          "word": "booster injection"
        }
      ]
    }
  ],
  "word": "booster shot"
}

{
  "forms": [
    {
      "form": "booster shots",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "booster shot (plural booster shots)",
      "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",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Immunology",
        "en:Pharmaceutical drugs"
      ],
      "glosses": [
        "A dose of an antigen (usually a vaccine) designed to strengthen immunity after an earlier immunizing dose."
      ],
      "links": [
        [
          "dose",
          "dose"
        ],
        [
          "antigen",
          "antigen"
        ],
        [
          "vaccine",
          "vaccine"
        ],
        [
          "strengthen",
          "strengthen"
        ],
        [
          "immunity",
          "immunity"
        ],
        [
          "immunizing",
          "immunizing"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "booster dose"
    },
    {
      "word": "booster injection"
    }
  ],
  "word": "booster shot"
}