"live and die by" meaning in English

{
  "forms": [
    {
      "form": "lives and dies by",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "living and dying by",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "lived and died by",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "lived and died by",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "live<> and die<> by"
      },
      "expansion": "live and die by (third-person singular simple present lives and dies by, present participle living and dying by, simple past and past participle lived and died by)",
      "name": "en-verb"
    }
  ],
  "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2019 November 21, Samanth Subramanian, “How our home delivery habit reshaped the world”, in The Guardian:",
          "text": "The e-commerce industry lives and dies by metrics, a few of which give us some grasp over this phenomenon.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Be completely reliant upon."
      ],
      "id": "en-live_and_die_by-en-verb-R-haTp3E",
      "raw_glosses": [
        "(idiomatic) Be completely reliant upon."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "live and die by"
}

{
  "forms": [
    {
      "form": "lives and dies by",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "living and dying by",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "lived and died by",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "lived and died by",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "live<> and die<> by"
      },
      "expansion": "live and die by (third-person singular simple present lives and dies by, present participle living and dying by, simple past and past participle lived and died by)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English verbs",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2019 November 21, Samanth Subramanian, “How our home delivery habit reshaped the world”, in The Guardian:",
          "text": "The e-commerce industry lives and dies by metrics, a few of which give us some grasp over this phenomenon.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Be completely reliant upon."
      ],
      "raw_glosses": [
        "(idiomatic) Be completely reliant upon."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "live and die by"
}