"assertion" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Terms suffixed with -ion",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "assert",
        "2": "ion"
      },
      "expansion": "assert + -ion",
      "name": "ety-suffix"
    }
  ],
  "etymology_text": "assert + -ion",
  "forms": [
    {
      "form": "assertion",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "assertions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "2": "assertions"
      },
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "text": "His assertion that the earth is flat was simply ignored."
        }
      ],
      "glosses": [
        "An assertion is a confident and forceful statement of fact or belief."
      ],
      "id": "simple-assertion-en-noun-H4KYnAcH",
      "raw_tags": [
        "countable"
      ],
      "synonyms": [
        {
          "word": "claim"
        },
        {
          "word": "declaration"
        }
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "text": "The lawyer's assertion convinced the jury."
        }
      ],
      "glosses": [
        "An assertion is the act of stating something with confidence."
      ],
      "id": "simple-assertion-en-noun-OPywFfD1",
      "raw_tags": [
        "countable"
      ],
      "synonyms": [
        {
          "word": "claim"
        },
        {
          "word": "declaration"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/əˈsɜːrʃən/"
    },
    {
      "audio": "en-us-assertion.ogg",
      "tags": [
        "US"
      ]
    },
    {
      "audio": "LL-Q1860 (eng)-I learned some phrases-assertion.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "assertion"
}

{
  "categories": [
    "Terms suffixed with -ion"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "assert",
        "2": "ion"
      },
      "expansion": "assert + -ion",
      "name": "ety-suffix"
    }
  ],
  "etymology_text": "assert + -ion",
  "forms": [
    {
      "form": "assertion",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "assertions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "2": "assertions"
      },
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Countable nouns"
      ],
      "examples": [
        {
          "text": "His assertion that the earth is flat was simply ignored."
        }
      ],
      "glosses": [
        "An assertion is a confident and forceful statement of fact or belief."
      ],
      "raw_tags": [
        "countable"
      ],
      "synonyms": [
        {
          "word": "claim"
        },
        {
          "word": "declaration"
        }
      ]
    },
    {
      "categories": [
        "Countable nouns"
      ],
      "examples": [
        {
          "text": "The lawyer's assertion convinced the jury."
        }
      ],
      "glosses": [
        "An assertion is the act of stating something with confidence."
      ],
      "raw_tags": [
        "countable"
      ],
      "synonyms": [
        {
          "word": "claim"
        },
        {
          "word": "declaration"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/əˈsɜːrʃən/"
    },
    {
      "audio": "en-us-assertion.ogg",
      "tags": [
        "US"
      ]
    },
    {
      "audio": "LL-Q1860 (eng)-I learned some phrases-assertion.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "assertion"
}