"thereby" meaning in English

{
  "forms": [
    {
      "form": "thereby",
      "raw_tags": [
        "Preposition"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "preposition"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Formal",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "He pulled it closer to him, thereby making it far easier to get up."
        },
        {
          "text": "Food product quality is more easily maintained thereby reducing spoilage losses."
        },
        {
          "text": "Water reflects less light than ice, thereby allowing the oceans to absorb more heat from the sun."
        },
        {
          "text": "I'm concerned by attempts to limit this right and thereby to limit our freedom."
        },
        {
          "text": "Having missed the first bit, he listened closely to catch the rest, hoping thereby to reply sensibly."
        },
        {
          "text": "This change would prevent the team (and thereby the school) from advancing."
        }
      ],
      "glosses": [
        "in that way or by that means"
      ],
      "id": "simple-thereby-en-prep-5Cf77tk2",
      "raw_tags": [
        "formal"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-us-thereby.ogg",
      "raw_tags": [
        "Audio"
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "word": "thereby"
}

{
  "forms": [
    {
      "form": "thereby",
      "raw_tags": [
        "Preposition"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "preposition"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        "Formal"
      ],
      "examples": [
        {
          "text": "He pulled it closer to him, thereby making it far easier to get up."
        },
        {
          "text": "Food product quality is more easily maintained thereby reducing spoilage losses."
        },
        {
          "text": "Water reflects less light than ice, thereby allowing the oceans to absorb more heat from the sun."
        },
        {
          "text": "I'm concerned by attempts to limit this right and thereby to limit our freedom."
        },
        {
          "text": "Having missed the first bit, he listened closely to catch the rest, hoping thereby to reply sensibly."
        },
        {
          "text": "This change would prevent the team (and thereby the school) from advancing."
        }
      ],
      "glosses": [
        "in that way or by that means"
      ],
      "raw_tags": [
        "formal"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-us-thereby.ogg",
      "raw_tags": [
        "Audio"
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "word": "thereby"
}