"in saecula saeculorum" meaning in Latin

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": "grc",
        "3": "εἰς τοὺς αἰῶνας τῶν αἰώνων",
        "lit": "into the ages of the ages"
      },
      "expansion": "Calque of Ancient Greek εἰς τοὺς αἰῶνας τῶν αἰώνων (eis toùs aiônas tôn aiṓnōn, literally “into the ages of the ages”)",
      "name": "clq"
    }
  ],
  "etymology_text": "Calque of Ancient Greek εἰς τοὺς αἰῶνας τῶν αἰώνων (eis toùs aiônas tôn aiṓnōn, literally “into the ages of the ages”).",
  "forms": [
    {
      "form": "in saecula saeculōrum",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "prepositional phrase",
        "head": "in saecula saeculōrum"
      },
      "expansion": "in saecula saeculōrum",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ecclesiastical Latin",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "la",
          "name": "Time",
          "orig": "la:Time",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "for ever and ever"
      ],
      "id": "en-in_saecula_saeculorum-la-prep_phrase-qhfG2lWv",
      "links": [
        [
          "for ever and ever",
          "for ever and ever"
        ]
      ],
      "raw_glosses": [
        "(Ecclesiastical Latin) for ever and ever"
      ],
      "related": [
        {
          "word": "in saeculum"
        }
      ],
      "synonyms": [
        {
          "word": "in sæcula sæculorum"
        }
      ],
      "tags": [
        "Ecclesiastical",
        "Latin"
      ],
      "wikipedia": [
        "in saecula saeculorum"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/in ˈse.ku.la se.kuˈlo.rum/",
      "note": "modern Italianate Ecclesiastical"
    },
    {
      "ipa": "[in ˈsɛːkulä sekuˈlɔːrum]",
      "note": "modern Italianate Ecclesiastical"
    }
  ],
  "word": "in saecula saeculorum"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": "grc",
        "3": "εἰς τοὺς αἰῶνας τῶν αἰώνων",
        "lit": "into the ages of the ages"
      },
      "expansion": "Calque of Ancient Greek εἰς τοὺς αἰῶνας τῶν αἰώνων (eis toùs aiônas tôn aiṓnōn, literally “into the ages of the ages”)",
      "name": "clq"
    }
  ],
  "etymology_text": "Calque of Ancient Greek εἰς τοὺς αἰῶνας τῶν αἰώνων (eis toùs aiônas tôn aiṓnōn, literally “into the ages of the ages”).",
  "forms": [
    {
      "form": "in saecula saeculōrum",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "prepositional phrase",
        "head": "in saecula saeculōrum"
      },
      "expansion": "in saecula saeculōrum",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "prep_phrase",
  "related": [
    {
      "word": "in saeculum"
    }
  ],
  "senses": [
    {
      "categories": [
        "Ecclesiastical Latin",
        "Latin entries with incorrect language header",
        "Latin lemmas",
        "Latin multiword terms",
        "Latin prepositional phrases",
        "Latin terms calqued from Ancient Greek",
        "Latin terms derived from Ancient Greek",
        "Latin terms with Ecclesiastical IPA pronunciation only",
        "Latin terms with IPA pronunciation",
        "la:Time"
      ],
      "glosses": [
        "for ever and ever"
      ],
      "links": [
        [
          "for ever and ever",
          "for ever and ever"
        ]
      ],
      "raw_glosses": [
        "(Ecclesiastical Latin) for ever and ever"
      ],
      "tags": [
        "Ecclesiastical",
        "Latin"
      ],
      "wikipedia": [
        "in saecula saeculorum"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/in ˈse.ku.la se.kuˈlo.rum/",
      "note": "modern Italianate Ecclesiastical"
    },
    {
      "ipa": "[in ˈsɛːkulä sekuˈlɔːrum]",
      "note": "modern Italianate Ecclesiastical"
    }
  ],
  "synonyms": [
    {
      "word": "in sæcula sæculorum"
    }
  ],
  "word": "in saecula saeculorum"
}