"can't" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Λέξεις με επίθημα -n't (αγγλικά)",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_text": ": can't < can + -n't (not)",
  "forms": [
    {
      "form": "can't"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "examples": [
        {
          "text": "I can't hear you.",
          "translation": "Δεν μπορώ να σε ακούσω."
        },
        {
          "text": "You can't smoke for the entire duration of the flight.",
          "translation": "Το κάπνισμα απαγορεύεται καθ' όλη την διάρκεια της πτήσης."
        },
        {
          "text": "≈ συνώνυμα: cannot"
        }
      ],
      "glosses": [
        "(αρνητικό modal verb) δεν μπορώ, απαγορεύεται"
      ],
      "id": "el-can't-en-verb-38hZ0MHZ"
    }
  ],
  "word": "can't"
}

{
  "categories": [
    "Λέξεις με επίθημα -n't (αγγλικά)"
  ],
  "etymology_text": ": can't < can + -n't (not)",
  "forms": [
    {
      "form": "can't"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "examples": [
        {
          "text": "I can't hear you.",
          "translation": "Δεν μπορώ να σε ακούσω."
        },
        {
          "text": "You can't smoke for the entire duration of the flight.",
          "translation": "Το κάπνισμα απαγορεύεται καθ' όλη την διάρκεια της πτήσης."
        },
        {
          "text": "≈ συνώνυμα: cannot"
        }
      ],
      "glosses": [
        "(αρνητικό modal verb) δεν μπορώ, απαγορεύεται"
      ]
    }
  ],
  "word": "can't"
}