"smartening up" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "smartening up",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1961 October, “The winter timetables of British Railways: Southern Region”, in Trains Illustrated, page 593",
          "text": "It is to be hoped that some corresponding smartening up of these other schedules may be expected before long.",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "word": "smarten up"
        }
      ],
      "glosses": [
        "present participle and gerund of smarten up"
      ],
      "id": "en-smartening_up-en-verb-INVyH~Fj",
      "links": [
        [
          "smarten up",
          "smarten up#English"
        ]
      ],
      "tags": [
        "form-of",
        "gerund",
        "participle",
        "present"
      ]
    }
  ],
  "word": "smartening up"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "smartening up",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English non-lemma forms",
        "English terms with quotations",
        "English verb forms"
      ],
      "examples": [
        {
          "ref": "1961 October, “The winter timetables of British Railways: Southern Region”, in Trains Illustrated, page 593",
          "text": "It is to be hoped that some corresponding smartening up of these other schedules may be expected before long.",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "word": "smarten up"
        }
      ],
      "glosses": [
        "present participle and gerund of smarten up"
      ],
      "links": [
        [
          "smarten up",
          "smarten up#English"
        ]
      ],
      "tags": [
        "form-of",
        "gerund",
        "participle",
        "present"
      ]
    }
  ],
  "word": "smartening up"
}