"isn't" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Λέξεις με επίθημα -n't (αγγλικά)",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_text": ": isn't < is + -n't (not)",
  "forms": [
    {
      "form": "isn't"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "examples": [
        {
          "text": "He isn't coming today.",
          "translation": "Δεν έρχεται σήμερα."
        }
      ],
      "glosses": [
        "δεν"
      ],
      "id": "el-isn't-en-verb-gig2n1AO"
    }
  ],
  "word": "isn't"
}

{
  "categories": [
    "Λέξεις με επίθημα -n't (αγγλικά)"
  ],
  "etymology_text": ": isn't < is + -n't (not)",
  "forms": [
    {
      "form": "isn't"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "examples": [
        {
          "text": "He isn't coming today.",
          "translation": "Δεν έρχεται σήμερα."
        }
      ],
      "glosses": [
        "δεν"
      ]
    }
  ],
  "word": "isn't"
}