"mega-" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "grc",
        "3": "μέγας",
        "4": "",
        "5": "great, large, mighty"
      },
      "expansion": "Ancient Greek μέγας (mégas, “great, large, mighty”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μέγας (mégas, “great, large, mighty”).",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "prefix"
      },
      "expansion": "mega-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "mè‧ga-"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 23 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "mega- (all senses)"
      ],
      "id": "en-mega--it-prefix-phG2N3P3",
      "links": [
        [
          "mega-",
          "mega-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌmɛ.ɡa/"
    }
  ],
  "word": "mega-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "grc",
        "3": "μέγας",
        "4": "",
        "5": "great, large, mighty"
      },
      "expansion": "Ancient Greek μέγας (mégas, “great, large, mighty”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μέγας (mégas, “great, large, mighty”).",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "prefix"
      },
      "expansion": "mega-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "mè‧ga-"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Italian 2-syllable words",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian prefixes",
        "Italian terms derived from Ancient Greek",
        "Italian terms with IPA pronunciation",
        "Pages using catfix",
        "Pages with 23 entries",
        "Pages with entries"
      ],
      "glosses": [
        "mega- (all senses)"
      ],
      "links": [
        [
          "mega-",
          "mega-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌmɛ.ɡa/"
    }
  ],
  "word": "mega-"
}