"improviser" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "improvise",
        "3": "er",
        "id2": "agent noun"
      },
      "expansion": "improvise + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "improvise + -er",
  "forms": [
    {
      "form": "improvisers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "improviser (plural improvisers)",
      "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": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -er (agent noun)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "One who improvises."
      ],
      "id": "en-improviser-en-noun-Uz6pWc9w",
      "links": [
        [
          "improvise",
          "improvise"
        ]
      ],
      "translations": [
        {
          "code": "cs",
          "lang": "Czech",
          "sense": "one who improvises",
          "tags": [
            "masculine"
          ],
          "word": "improvizátor"
        }
      ]
    }
  ],
  "word": "improviser"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "improvise",
        "3": "er",
        "id2": "agent noun"
      },
      "expansion": "improvise + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "improvise + -er",
  "forms": [
    {
      "form": "improvisers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "improviser (plural improvisers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English agent nouns",
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -er (agent noun)",
        "en:People"
      ],
      "glosses": [
        "One who improvises."
      ],
      "links": [
        [
          "improvise",
          "improvise"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "cs",
      "lang": "Czech",
      "sense": "one who improvises",
      "tags": [
        "masculine"
      ],
      "word": "improvizátor"
    }
  ],
  "word": "improviser"
}