"κεραυνός εν αιθρία" meaning in Greek

{
  "etymology_text": "See κεραυνός m (keravnós) and the ancient terms in the phrase ἐν (en, “in”) & the dative αἰθρίᾳ (aithríāi) of feminine αἰθρία (aithría) (by ellipsis of a feminine noun) of adjective αἴθριος (aíthrios),",
  "forms": [
    {
      "form": "keravnós en aithría",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "phrase",
        "head": "",
        "sort": ""
      },
      "expansion": "κεραυνός εν αιθρία • (keravnós en aithría)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "κεραυνός εν αιθρία • (keravnós en aithría)",
      "name": "el-phrase"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Greek terms with dative",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "bolt from the blue Literally, “lightning bolt in a clear sky”"
      ],
      "id": "en-κεραυνός_εν_αιθρία-el-phrase-rwZISmu7",
      "links": [
        [
          "bolt from the blue",
          "bolt from the blue"
        ]
      ],
      "qualifier": "formal but common",
      "raw_glosses": [
        "(formal but common, in negative sense) bolt from the blue Literally, “lightning bolt in a clear sky”"
      ],
      "raw_tags": [
        "in negative sense"
      ],
      "wikipedia": [
        "University of Chicago"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ceɾavˈnos en‿eˈθɾi.a/"
    }
  ],
  "word": "κεραυνός εν αιθρία"
}

{
  "etymology_text": "See κεραυνός m (keravnós) and the ancient terms in the phrase ἐν (en, “in”) & the dative αἰθρίᾳ (aithríāi) of feminine αἰθρία (aithría) (by ellipsis of a feminine noun) of adjective αἴθριος (aíthrios),",
  "forms": [
    {
      "form": "keravnós en aithría",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "phrase",
        "head": "",
        "sort": ""
      },
      "expansion": "κεραυνός εν αιθρία • (keravnós en aithría)",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "κεραυνός εν αιθρία • (keravnós en aithría)",
      "name": "el-phrase"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Greek entries with incorrect language header",
        "Greek formal terms",
        "Greek lemmas",
        "Greek multiword terms",
        "Greek phrases",
        "Greek terms with dative",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "bolt from the blue Literally, “lightning bolt in a clear sky”"
      ],
      "links": [
        [
          "bolt from the blue",
          "bolt from the blue"
        ]
      ],
      "qualifier": "formal but common",
      "raw_glosses": [
        "(formal but common, in negative sense) bolt from the blue Literally, “lightning bolt in a clear sky”"
      ],
      "raw_tags": [
        "in negative sense"
      ],
      "wikipedia": [
        "University of Chicago"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ceɾavˈnos en‿eˈθɾi.a/"
    }
  ],
  "word": "κεραυνός εν αιθρία"
}