"mega" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": ":af",
        "3": "meg",
        "4": "-a",
        "text": "+",
        "tree": "1"
      },
      "expansion": "Etymology tree\nEsperanto meg\nEsperanto -a\nEsperanto mega\nFrom meg + -a.",
      "name": "ety"
    }
  ],
  "etymology_text": "Etymology tree\nEsperanto meg\nEsperanto -a\nEsperanto mega\nFrom meg + -a.",
  "forms": [
    {
      "form": "megan",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "megaj",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "megajn",
      "tags": [
        "accusative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mega (accusative singular megan, plural megaj, accusative plural megajn)",
      "name": "eo-head"
    },
    {
      "args": {
        "1": "eo",
        "2": "rare"
      },
      "expansion": "(rare)",
      "name": "tlb"
    }
  ],
  "hyphenation": [
    "me‧ga"
  ],
  "hyphenations": [
    {
      "parts": [
        "me‧ga"
      ]
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Esperanto entries referencing missing etymons",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto entries with etymology texts",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto entries with etymology trees",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto neologisms",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto ordinal numbers",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto terms suffixed with -a",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using etymon with no ID",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 20 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with etymology trees",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "millionth"
      ],
      "id": "en-mega-eo-adj-ypFUQH8v",
      "links": [
        [
          "ordinal number",
          "ordinal number"
        ],
        [
          "millionth",
          "millionth"
        ]
      ],
      "raw_glosses": [
        "(neologism, ordinal number) millionth"
      ],
      "synonyms": [
        {
          "word": "miliona"
        }
      ],
      "tags": [
        "neologism",
        "numeral",
        "ordinal",
        "rare"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmeɡa/"
    },
    {
      "rhymes": "-eɡa"
    }
  ],
  "word": "mega"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": ":af",
        "3": "meg",
        "4": "-a",
        "text": "+",
        "tree": "1"
      },
      "expansion": "Etymology tree\nEsperanto meg\nEsperanto -a\nEsperanto mega\nFrom meg + -a.",
      "name": "ety"
    }
  ],
  "etymology_text": "Etymology tree\nEsperanto meg\nEsperanto -a\nEsperanto mega\nFrom meg + -a.",
  "forms": [
    {
      "form": "megan",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "megaj",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "megajn",
      "tags": [
        "accusative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mega (accusative singular megan, plural megaj, accusative plural megajn)",
      "name": "eo-head"
    },
    {
      "args": {
        "1": "eo",
        "2": "rare"
      },
      "expansion": "(rare)",
      "name": "tlb"
    }
  ],
  "hyphenation": [
    "me‧ga"
  ],
  "hyphenations": [
    {
      "parts": [
        "me‧ga"
      ]
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Esperanto 2-syllable words",
        "Esperanto adjectives",
        "Esperanto entries referencing missing etymons",
        "Esperanto entries with etymology texts",
        "Esperanto entries with etymology trees",
        "Esperanto entries with incorrect language header",
        "Esperanto lemmas",
        "Esperanto neologisms",
        "Esperanto ordinal numbers",
        "Esperanto rare terms",
        "Esperanto terms suffixed with -a",
        "Esperanto terms with IPA pronunciation",
        "Pages using etymon with no ID",
        "Pages with 20 entries",
        "Pages with entries",
        "Pages with etymology trees",
        "Rhymes:Esperanto/eɡa",
        "Rhymes:Esperanto/eɡa/2 syllables"
      ],
      "glosses": [
        "millionth"
      ],
      "links": [
        [
          "ordinal number",
          "ordinal number"
        ],
        [
          "millionth",
          "millionth"
        ]
      ],
      "raw_glosses": [
        "(neologism, ordinal number) millionth"
      ],
      "synonyms": [
        {
          "word": "miliona"
        }
      ],
      "tags": [
        "neologism",
        "numeral",
        "ordinal",
        "rare"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmeɡa/"
    },
    {
      "rhymes": "-eɡa"
    }
  ],
  "word": "mega"
}