"undefeated" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Λέξεις με πρόθημα un- (αγγλικά)",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_text": ": undefeated < un- + defeated",
  "forms": [
    {
      "form": "undefeated"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "examples": [
        {
          "text": "They crushed their, up until then, undefeated opponents.",
          "translation": "Κατατρόπωσαν τους ως τότε αήττητους αντιπάλους."
        },
        {
          "text": "He’s proud he is undefeated in chess.",
          "translation": "Υπερηφανεύεται ότι είναι ανίκητος στο σκάκι."
        },
        {
          "text": "≈ συνώνυμα: unbeaten"
        }
      ],
      "glosses": [
        "αήττητος, ανίκητος, που δεν έχει νικηθεί"
      ],
      "id": "el-undefeated-en-adj-MD7cIOjK"
    }
  ],
  "word": "undefeated"
}

{
  "categories": [
    "Λέξεις με πρόθημα un- (αγγλικά)"
  ],
  "etymology_text": ": undefeated < un- + defeated",
  "forms": [
    {
      "form": "undefeated"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "examples": [
        {
          "text": "They crushed their, up until then, undefeated opponents.",
          "translation": "Κατατρόπωσαν τους ως τότε αήττητους αντιπάλους."
        },
        {
          "text": "He’s proud he is undefeated in chess.",
          "translation": "Υπερηφανεύεται ότι είναι ανίκητος στο σκάκι."
        },
        {
          "text": "≈ συνώνυμα: unbeaten"
        }
      ],
      "glosses": [
        "αήττητος, ανίκητος, που δεν έχει νικηθεί"
      ]
    }
  ],
  "word": "undefeated"
}