"backbone" meaning in English

{
  "categories": [],
  "etymology_templates": [
    {
      "args": {
        "1": "back",
        "2": "bone"
      },
      "expansion": "back + bone",
      "name": "compound"
    }
  ],
  "etymology_text": "back + bone",
  "forms": [
    {
      "form": "backbone",
      "raw_tags": [
        "Singular"
      ]
    },
    {
      "form": "backbones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "glosses": [
        "The backbone is the bones in a person's or animal's back."
      ],
      "id": "simple-backbone-en-noun-UphfePVt",
      "raw_tags": [
        "countable"
      ],
      "synonyms": [
        {
          "word": "spine"
        },
        {
          "word": "vertebrae"
        }
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "text": "If you had any backbone you wouldn't let people tell you what to do all the time."
        }
      ],
      "glosses": [
        "If you have backbone, you do not back down easily. You stand up for yourself."
      ],
      "id": "simple-backbone-en-noun-MckgkEgn",
      "raw_tags": [
        "countable & uncountable"
      ],
      "synonyms": [
        {
          "word": "strength"
        },
        {
          "word": "will"
        },
        {
          "word": "courage"
        },
        {
          "word": "bravery"
        }
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "text": "Customer service is the backbone of our business."
        }
      ],
      "glosses": [
        "The backbone of something is what holds it together or makes it strong."
      ],
      "id": "simple-backbone-en-noun-UU9GPGa7",
      "raw_tags": [
        "countable"
      ],
      "synonyms": [
        {
          "word": "foundation"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈbækˌbəʊn/",
      "tags": [
        "UK"
      ]
    },
    {
      "sampa": "/\"b{k%b@Un/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/ˈbækˌboʊn/",
      "tags": [
        "US"
      ]
    },
    {
      "audio": "en-us-backbone.ogg",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "backbone"
}

{
  "categories": [
    "Compound terms"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "back",
        "2": "bone"
      },
      "expansion": "back + bone",
      "name": "compound"
    }
  ],
  "etymology_text": "back + bone",
  "forms": [
    {
      "form": "backbone",
      "raw_tags": [
        "Singular"
      ]
    },
    {
      "form": "backbones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Countable nouns"
      ],
      "glosses": [
        "The backbone is the bones in a person's or animal's back."
      ],
      "raw_tags": [
        "countable"
      ],
      "synonyms": [
        {
          "word": "spine"
        },
        {
          "word": "vertebrae"
        }
      ]
    },
    {
      "categories": [
        "Countable nouns",
        "Uncountable nouns"
      ],
      "examples": [
        {
          "text": "If you had any backbone you wouldn't let people tell you what to do all the time."
        }
      ],
      "glosses": [
        "If you have backbone, you do not back down easily. You stand up for yourself."
      ],
      "raw_tags": [
        "countable & uncountable"
      ],
      "synonyms": [
        {
          "word": "strength"
        },
        {
          "word": "will"
        },
        {
          "word": "courage"
        },
        {
          "word": "bravery"
        }
      ]
    },
    {
      "categories": [
        "Countable nouns"
      ],
      "examples": [
        {
          "text": "Customer service is the backbone of our business."
        }
      ],
      "glosses": [
        "The backbone of something is what holds it together or makes it strong."
      ],
      "raw_tags": [
        "countable"
      ],
      "synonyms": [
        {
          "word": "foundation"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈbækˌbəʊn/",
      "tags": [
        "UK"
      ]
    },
    {
      "sampa": "/\"b{k%b@Un/",
      "tags": [
        "UK"
      ]
    },
    {
      "ipa": "/ˈbækˌboʊn/",
      "tags": [
        "US"
      ]
    },
    {
      "audio": "en-us-backbone.ogg",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "backbone"
}