"многая лета" meaning in Russian

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "cu",
        "3": "мъногаꙗ лѣта"
      },
      "expansion": "Borrowed from Old Church Slavonic мъногаꙗ лѣта (mŭnogaja lěta)",
      "name": "bor+"
    },
    {
      "args": {
        "1": "uk",
        "2": "мно́гая лі́та"
      },
      "expansion": "Ukrainian мно́гая лі́та (mnóhaja líta)",
      "name": "cog"
    }
  ],
  "etymology_text": "Borrowed from Old Church Slavonic мъногаꙗ лѣта (mŭnogaja lěta). Cognate with Ukrainian мно́гая лі́та (mnóhaja líta). Cf. modern Russian мно́гие го́ды (mnógije gódy), мно́го лет (mnógo let) or less commonly мно́гие ле́та (mnógije léta).",
  "forms": [
    {
      "form": "мно́гая ле́та",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "mnógaja léta",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "phrase",
        "head": "мно́гая ле́та"
      },
      "expansion": "мно́гая ле́та • (mnógaja léta)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "wish for longevity, many years (of prosperity, health, etc.)"
      ],
      "id": "en-многая_лета-ru-phrase-vDpsBUeQ",
      "links": [
        [
          "longevity",
          "longevity"
        ]
      ],
      "qualifier": "poetic or ecclesiastic",
      "raw_glosses": [
        "(archaic, poetic or ecclesiastic) wish for longevity, many years (of prosperity, health, etc.)"
      ],
      "related": [
        {
          "roman": "mnogolétije",
          "word": "многоле́тие"
        }
      ],
      "synonyms": [
        {
          "roman": "mnógaja lě́ta",
          "word": "мно́гая лѣ́та — Pre-reform orthography (1918)"
        },
        {
          "english": "somewhat modernised",
          "roman": "mnógije léta",
          "word": "мно́гие ле́та"
        },
        {
          "english": "modernised",
          "roman": "dolgix lét",
          "word": "долгих ле́т"
        }
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈmnoɡəjə ˈlʲetə]"
    },
    {
      "ipa": "[ˈmnoɣəjə ˈlʲetə]"
    }
  ],
  "word": "многая лета"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "cu",
        "3": "мъногаꙗ лѣта"
      },
      "expansion": "Borrowed from Old Church Slavonic мъногаꙗ лѣта (mŭnogaja lěta)",
      "name": "bor+"
    },
    {
      "args": {
        "1": "uk",
        "2": "мно́гая лі́та"
      },
      "expansion": "Ukrainian мно́гая лі́та (mnóhaja líta)",
      "name": "cog"
    }
  ],
  "etymology_text": "Borrowed from Old Church Slavonic мъногаꙗ лѣта (mŭnogaja lěta). Cognate with Ukrainian мно́гая лі́та (mnóhaja líta). Cf. modern Russian мно́гие го́ды (mnógije gódy), мно́го лет (mnógo let) or less commonly мно́гие ле́та (mnógije léta).",
  "forms": [
    {
      "form": "мно́гая ле́та",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "mnógaja léta",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ru",
        "2": "phrase",
        "head": "мно́гая ле́та"
      },
      "expansion": "мно́гая ле́та • (mnógaja léta)",
      "name": "head"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "phrase",
  "related": [
    {
      "roman": "mnogolétije",
      "word": "многоле́тие"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Russian entries with incorrect language header",
        "Russian lemmas",
        "Russian multiword terms",
        "Russian phrases",
        "Russian poetic terms",
        "Russian terms borrowed from Old Church Slavonic",
        "Russian terms derived from Old Church Slavonic",
        "Russian terms with IPA pronunciation",
        "Russian terms with archaic senses"
      ],
      "glosses": [
        "wish for longevity, many years (of prosperity, health, etc.)"
      ],
      "links": [
        [
          "longevity",
          "longevity"
        ]
      ],
      "qualifier": "poetic or ecclesiastic",
      "raw_glosses": [
        "(archaic, poetic or ecclesiastic) wish for longevity, many years (of prosperity, health, etc.)"
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈmnoɡəjə ˈlʲetə]"
    },
    {
      "ipa": "[ˈmnoɣəjə ˈlʲetə]"
    }
  ],
  "synonyms": [
    {
      "roman": "mnógaja lě́ta",
      "word": "мно́гая лѣ́та — Pre-reform orthography (1918)"
    },
    {
      "english": "somewhat modernised",
      "roman": "mnógije léta",
      "word": "мно́гие ле́та"
    },
    {
      "english": "modernised",
      "roman": "dolgix lét",
      "word": "долгих ле́т"
    }
  ],
  "word": "многая лета"
}