"tickler file" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "tickler",
        "3": "file"
      },
      "expansion": "tickler + file",
      "name": "compound"
    }
  ],
  "etymology_text": "tickler + file",
  "forms": [
    {
      "form": "tickler files",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tickler file (plural tickler files)",
      "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 topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Containers",
          "orig": "en:Containers",
          "parents": [
            "Tools",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A collection of folders in which documents are filed according to the future date on which each will need action."
      ],
      "id": "en-tickler_file-en-noun-jMHbr82Z",
      "links": [
        [
          "document",
          "document"
        ]
      ],
      "synonyms": [
        {
          "sense": "collection of folders",
          "word": "43 folder system"
        }
      ],
      "wikipedia": [
        "tickler file"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tɪkəlɚ faɪl/",
      "tags": [
        "US"
      ]
    },
    {
      "rhymes": "-aɪl"
    }
  ],
  "word": "tickler file"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "tickler",
        "3": "file"
      },
      "expansion": "tickler + file",
      "name": "compound"
    }
  ],
  "etymology_text": "tickler + file",
  "forms": [
    {
      "form": "tickler files",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tickler file (plural tickler files)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with IPA pronunciation",
        "English terms with non-redundant non-automated sortkeys",
        "Rhymes:English/aɪl",
        "Rhymes:English/aɪl/3 syllables",
        "en:Containers"
      ],
      "glosses": [
        "A collection of folders in which documents are filed according to the future date on which each will need action."
      ],
      "links": [
        [
          "document",
          "document"
        ]
      ],
      "wikipedia": [
        "tickler file"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tɪkəlɚ faɪl/",
      "tags": [
        "US"
      ]
    },
    {
      "rhymes": "-aɪl"
    }
  ],
  "synonyms": [
    {
      "sense": "collection of folders",
      "word": "43 folder system"
    }
  ],
  "word": "tickler file"
}