"cohort study" meaning in English

{
  "forms": [
    {
      "form": "cohort studies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cohort studies"
      },
      "expansion": "cohort study (plural cohort studies)",
      "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"
        }
      ],
      "glosses": [
        "A type of research project in which participants sharing a common feature (the cohort) are studied over a long period of time."
      ],
      "id": "en-cohort_study-en-noun-RUqIui5K",
      "links": [
        [
          "research",
          "research"
        ],
        [
          "participant",
          "participant"
        ],
        [
          "time",
          "time"
        ]
      ],
      "translations": [
        {
          "code": "ar",
          "lang": "Arabic",
          "roman": "dirāsa al-ʔatrāb",
          "sense": "cohort study",
          "tags": [
            "feminine"
          ],
          "word": "دِرَاسَة الْأَتْرَاب"
        },
        {
          "alt": "dirāsa(t) al-ttaʕarruḍ",
          "code": "ar",
          "lang": "Arabic",
          "sense": "cohort study",
          "tags": [
            "feminine"
          ],
          "word": "دِرَاسَة التَّعَرُّض"
        },
        {
          "alt": "dirāsa(t) ʔatrābiyya",
          "code": "ar",
          "lang": "Arabic",
          "sense": "cohort study",
          "tags": [
            "feminine"
          ],
          "word": "دِرَاسَة أَتْرَابِيَّة"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "cohort study",
          "word": "kohorttitutkimus"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "cohort study",
          "tags": [
            "feminine"
          ],
          "word": "étude de cohorte"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "cohort study",
          "tags": [
            "feminine"
          ],
          "word": "Kohortenstudie"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "cohort study",
          "tags": [
            "neuter"
          ],
          "word": "badanie kohorty"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "kogórtnoje isslédovanije",
          "sense": "cohort study",
          "tags": [
            "neuter"
          ],
          "word": "кого́ртное иссле́дование"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "cohort study",
          "tags": [
            "common-gender"
          ],
          "word": "kohortstudie"
        }
      ]
    }
  ],
  "word": "cohort study"
}

{
  "forms": [
    {
      "form": "cohort studies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cohort studies"
      },
      "expansion": "cohort study (plural cohort studies)",
      "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"
      ],
      "glosses": [
        "A type of research project in which participants sharing a common feature (the cohort) are studied over a long period of time."
      ],
      "links": [
        [
          "research",
          "research"
        ],
        [
          "participant",
          "participant"
        ],
        [
          "time",
          "time"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "ar",
      "lang": "Arabic",
      "roman": "dirāsa al-ʔatrāb",
      "sense": "cohort study",
      "tags": [
        "feminine"
      ],
      "word": "دِرَاسَة الْأَتْرَاب"
    },
    {
      "alt": "dirāsa(t) al-ttaʕarruḍ",
      "code": "ar",
      "lang": "Arabic",
      "sense": "cohort study",
      "tags": [
        "feminine"
      ],
      "word": "دِرَاسَة التَّعَرُّض"
    },
    {
      "alt": "dirāsa(t) ʔatrābiyya",
      "code": "ar",
      "lang": "Arabic",
      "sense": "cohort study",
      "tags": [
        "feminine"
      ],
      "word": "دِرَاسَة أَتْرَابِيَّة"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "cohort study",
      "word": "kohorttitutkimus"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "cohort study",
      "tags": [
        "feminine"
      ],
      "word": "étude de cohorte"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "cohort study",
      "tags": [
        "feminine"
      ],
      "word": "Kohortenstudie"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "cohort study",
      "tags": [
        "neuter"
      ],
      "word": "badanie kohorty"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "kogórtnoje isslédovanije",
      "sense": "cohort study",
      "tags": [
        "neuter"
      ],
      "word": "кого́ртное иссле́дование"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "cohort study",
      "tags": [
        "common-gender"
      ],
      "word": "kohortstudie"
    }
  ],
  "word": "cohort study"
}