"on fire" meaning in English

{
  "etymology_text": "on fire < → δείτε τις λέξεις on και fire",
  "forms": [
    {
      "form": "on fire"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "examples": [
        {
          "text": "the house was on fire for three hours - το σπίτι καιγόταν για τρεις ώρες"
        }
      ],
      "glosses": [
        "που καίγεται, που έχει τυλιχτεί στις φλόγες"
      ],
      "id": "el-on_fire-en-adj-KscXFoY2",
      "synonyms": [
        {
          "word": "afire"
        },
        {
          "word": "aflame"
        },
        {
          "word": "alight"
        },
        {
          "word": "burning"
        },
        {
          "word": "flaming"
        },
        {
          "word": "go up in smoke"
        },
        {
          "word": "in flames"
        }
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Μεταφορικοί όροι (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "the player has scored 25 points this game; he's on fire! - ο παίκτης έχει σκοράρει 25 πόντους σ'αυτό παιχνίδι· έχει ρέντα"
        }
      ],
      "glosses": [
        "που έχει πάρει φωτιά, που έχει ρέντα"
      ],
      "id": "el-on_fire-en-adj-QmYQeTM2",
      "raw_tags": [
        "μεταφορικά"
      ],
      "synonyms": [
        {
          "word": "on a roll"
        },
        {
          "word": "on a tear"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "ɒn faɪə(ɹ)"
    }
  ],
  "word": "on fire"
}

{
  "etymology_text": "on fire < → δείτε τις λέξεις on και fire",
  "forms": [
    {
      "form": "on fire"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "examples": [
        {
          "text": "the house was on fire for three hours - το σπίτι καιγόταν για τρεις ώρες"
        }
      ],
      "glosses": [
        "που καίγεται, που έχει τυλιχτεί στις φλόγες"
      ],
      "synonyms": [
        {
          "word": "afire"
        },
        {
          "word": "aflame"
        },
        {
          "word": "alight"
        },
        {
          "word": "burning"
        },
        {
          "word": "flaming"
        },
        {
          "word": "go up in smoke"
        },
        {
          "word": "in flames"
        }
      ]
    },
    {
      "categories": [
        "Μεταφορικοί όροι (αγγλικά)"
      ],
      "examples": [
        {
          "text": "the player has scored 25 points this game; he's on fire! - ο παίκτης έχει σκοράρει 25 πόντους σ'αυτό παιχνίδι· έχει ρέντα"
        }
      ],
      "glosses": [
        "που έχει πάρει φωτιά, που έχει ρέντα"
      ],
      "raw_tags": [
        "μεταφορικά"
      ],
      "synonyms": [
        {
          "word": "on a roll"
        },
        {
          "word": "on a tear"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "ɒn faɪə(ɹ)"
    }
  ],
  "word": "on fire"
}