"first unit" meaning in English

{
  "antonyms": [
    {
      "word": "second unit"
    }
  ],
  "forms": [
    {
      "form": "first units",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "first unit (plural first units)",
      "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": "topical",
          "langcode": "en",
          "name": "Cinematography",
          "orig": "en:Cinematography",
          "parents": [
            "Film",
            "Entertainment",
            "Mass media",
            "Culture",
            "Media",
            "Society",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The team that shoots footage which is of primary importance for the final cut of the motion picture, including all scenes involving actors, or at least stars of the motion picture."
      ],
      "id": "en-first_unit-en-noun-Aqkh976J",
      "links": [
        [
          "cinematography",
          "cinematography"
        ],
        [
          "footage",
          "footage"
        ],
        [
          "motion picture",
          "motion picture"
        ]
      ],
      "raw_glosses": [
        "(cinematography) The team that shoots footage which is of primary importance for the final cut of the motion picture, including all scenes involving actors, or at least stars of the motion picture."
      ],
      "topics": [
        "broadcasting",
        "cinematography",
        "film",
        "media",
        "television"
      ]
    }
  ],
  "word": "first unit"
}

{
  "antonyms": [
    {
      "word": "second unit"
    }
  ],
  "forms": [
    {
      "form": "first units",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "first unit (plural first units)",
      "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",
        "en:Cinematography"
      ],
      "glosses": [
        "The team that shoots footage which is of primary importance for the final cut of the motion picture, including all scenes involving actors, or at least stars of the motion picture."
      ],
      "links": [
        [
          "cinematography",
          "cinematography"
        ],
        [
          "footage",
          "footage"
        ],
        [
          "motion picture",
          "motion picture"
        ]
      ],
      "raw_glosses": [
        "(cinematography) The team that shoots footage which is of primary importance for the final cut of the motion picture, including all scenes involving actors, or at least stars of the motion picture."
      ],
      "topics": [
        "broadcasting",
        "cinematography",
        "film",
        "media",
        "television"
      ]
    }
  ],
  "word": "first unit"
}