"principal" meaning in English

{
  "forms": [
    {
      "form": "principal",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "–",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "–",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "principal"
      },
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Attributive modifiers",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Canada's principal trading partner is the USA."
        },
        {
          "text": "Presumably most of us work for the same principal reason – in order to live."
        }
      ],
      "glosses": [
        "The principal thing is the main or most important one."
      ],
      "id": "simple-principal-en-adj-LMRhvzc3",
      "raw_tags": [
        "usually before a noun"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈprɪnsɪpəl/"
    },
    {
      "audio": "en-us-principal.ogg",
      "tags": [
        "US"
      ]
    },
    {
      "homophones": [
        "principle"
      ]
    }
  ],
  "word": "principal"
}

{
  "forms": [
    {
      "form": "principal",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "principals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "glosses": [
        "In American English, a principal is the head of a school. (headmaster in British English)"
      ],
      "id": "simple-principal-en-noun-WerQMaN1",
      "raw_tags": [
        "countable"
      ]
    },
    {
      "categories": [],
      "glosses": [
        "The principal is the most important person in a business, or an artistic group such as a dancers."
      ],
      "id": "simple-principal-en-noun-DFSC0CME",
      "raw_tags": [
        "countable"
      ]
    },
    {
      "categories": [],
      "glosses": [
        "Principal is the money that you borrow and must pay back. It does not include interest."
      ],
      "id": "simple-principal-en-noun-Eck-jhN-",
      "raw_tags": [
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈprɪnsɪpəl/"
    },
    {
      "audio": "en-us-principal.ogg",
      "tags": [
        "US"
      ]
    },
    {
      "homophones": [
        "principle"
      ]
    }
  ],
  "word": "principal"
}

{
  "forms": [
    {
      "form": "principal",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "–",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "–",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "principal"
      },
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Attributive modifiers"
      ],
      "examples": [
        {
          "text": "Canada's principal trading partner is the USA."
        },
        {
          "text": "Presumably most of us work for the same principal reason – in order to live."
        }
      ],
      "glosses": [
        "The principal thing is the main or most important one."
      ],
      "raw_tags": [
        "usually before a noun"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈprɪnsɪpəl/"
    },
    {
      "audio": "en-us-principal.ogg",
      "tags": [
        "US"
      ]
    },
    {
      "homophones": [
        "principle"
      ]
    }
  ],
  "word": "principal"
}

{
  "forms": [
    {
      "form": "principal",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "principals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Countable nouns"
      ],
      "glosses": [
        "In American English, a principal is the head of a school. (headmaster in British English)"
      ],
      "raw_tags": [
        "countable"
      ]
    },
    {
      "categories": [
        "Countable nouns"
      ],
      "glosses": [
        "The principal is the most important person in a business, or an artistic group such as a dancers."
      ],
      "raw_tags": [
        "countable"
      ]
    },
    {
      "categories": [
        "Uncountable nouns"
      ],
      "glosses": [
        "Principal is the money that you borrow and must pay back. It does not include interest."
      ],
      "raw_tags": [
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈprɪnsɪpəl/"
    },
    {
      "audio": "en-us-principal.ogg",
      "tags": [
        "US"
      ]
    },
    {
      "homophones": [
        "principle"
      ]
    }
  ],
  "word": "principal"
}