"while one is at it" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "at it"
      },
      "expansion": "at it",
      "name": "m"
    }
  ],
  "etymology_text": "See at it.",
  "head_templates": [
    {
      "args": {
        "head": "while one is at it"
      },
      "expansion": "while one is at it",
      "name": "en-conjunction"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "conj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "If you're going downtown anyway, could you return these books to the library while you're at it?",
          "type": "example"
        }
      ],
      "glosses": [
        "While one is doing that; while one is carrying out that action; suggesting another action one could accomplish at the same time."
      ],
      "id": "en-while_one_is_at_it-en-conj-cxWe3G4x",
      "links": [
        [
          "action",
          "action"
        ]
      ],
      "related": [
        {
          "word": "kill two birds with one stone"
        },
        {
          "word": "might as well"
        }
      ],
      "synonyms": [
        {
          "word": "while one is about it"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "samalla"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "word": "tant qu’on y est"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "word": "tant qu’à faire"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "word": "wenn man schon mal dran ist"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "word": "przy okazji"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "raz už na to pošló",
          "sense": "Translations",
          "word": "раз уж на то пошло́"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "Translations",
          "word": "ya que estamos"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "Translations",
          "word": "när man ändå håller på"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "Translations",
          "word": "när man ändå är igång"
        },
        {
          "code": "vi",
          "lang": "Vietnamese",
          "sense": "Translations",
          "word": "tiện đấy làm luôn"
        }
      ]
    }
  ],
  "word": "while one is at it"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "at it"
      },
      "expansion": "at it",
      "name": "m"
    }
  ],
  "etymology_text": "See at it.",
  "head_templates": [
    {
      "args": {
        "head": "while one is at it"
      },
      "expansion": "while one is at it",
      "name": "en-conjunction"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "conj",
  "related": [
    {
      "word": "kill two birds with one stone"
    },
    {
      "word": "might as well"
    }
  ],
  "senses": [
    {
      "categories": [
        "English conjunctions",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with usage examples",
        "Translation table header lacks gloss"
      ],
      "examples": [
        {
          "text": "If you're going downtown anyway, could you return these books to the library while you're at it?",
          "type": "example"
        }
      ],
      "glosses": [
        "While one is doing that; while one is carrying out that action; suggesting another action one could accomplish at the same time."
      ],
      "links": [
        [
          "action",
          "action"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "while one is about it"
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "samalla"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "word": "tant qu’on y est"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "word": "tant qu’à faire"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "word": "wenn man schon mal dran ist"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "word": "przy okazji"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "raz už na to pošló",
      "sense": "Translations",
      "word": "раз уж на то пошло́"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "Translations",
      "word": "ya que estamos"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "Translations",
      "word": "när man ändå håller på"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "Translations",
      "word": "när man ändå är igång"
    },
    {
      "code": "vi",
      "lang": "Vietnamese",
      "sense": "Translations",
      "word": "tiện đấy làm luôn"
    }
  ],
  "word": "while one is at it"
}