"at the expense of" meaning in English

{
  "etymology_text": ": at the expense of < → δείτε τις λέξεις at, the, expense και of",
  "forms": [
    {
      "form": "at the expense of"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ιδιωματισμοί (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "He got the first prize but at the expense of his health.",
          "translation": "Πήρε το πρώτο βραβείο αλλά σε βάρος της υγείας του."
        },
        {
          "text": "No one can laugh at my expense.",
          "translation": "Κανείς δεν μπορεί να γελάσει σε βάρος μου."
        }
      ],
      "glosses": [
        "σε βάρος του κάτι"
      ],
      "id": "el-at_the_expense_of-en-phrase-ANgAqPxl",
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "at the expense of"
}

{
  "etymology_text": ": at the expense of < → δείτε τις λέξεις at, the, expense και of",
  "forms": [
    {
      "form": "at the expense of"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Ιδιωματισμοί (αγγλικά)"
      ],
      "examples": [
        {
          "text": "He got the first prize but at the expense of his health.",
          "translation": "Πήρε το πρώτο βραβείο αλλά σε βάρος της υγείας του."
        },
        {
          "text": "No one can laugh at my expense.",
          "translation": "Κανείς δεν μπορεί να γελάσει σε βάρος μου."
        }
      ],
      "glosses": [
        "σε βάρος του κάτι"
      ],
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "at the expense of"
}