"NRG" meaning in English

{
  "etymology_text": "Initialism created by replacement of word with a sequence of individually voiced out letters of similar sound.",
  "head_templates": [
    {
      "args": {
        "1": "!"
      },
      "expansion": "NRG (plural not attested)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "energy"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English gramograms",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English nouns with unattested plurals",
          "parents": [
            "Nouns with unattested plurals",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "Euro-NRG"
        },
        {
          "word": "Hi-NRG"
        },
        {
          "word": "hard NRG"
        }
      ],
      "glosses": [
        "Initialism of energy."
      ],
      "id": "en-NRG-en-noun-9~CH4qqZ",
      "links": [
        [
          "energy",
          "energy#English"
        ]
      ],
      "raw_glosses": [
        "(slang) Initialism of energy."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism",
        "no-plural",
        "slang"
      ]
    }
  ],
  "word": "NRG"
}

{
  "derived": [
    {
      "word": "Euro-NRG"
    },
    {
      "word": "Hi-NRG"
    },
    {
      "word": "hard NRG"
    }
  ],
  "etymology_text": "Initialism created by replacement of word with a sequence of individually voiced out letters of similar sound.",
  "head_templates": [
    {
      "args": {
        "1": "!"
      },
      "expansion": "NRG (plural not attested)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "energy"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English gramograms",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "English nouns with unattested plurals",
        "English slang",
        "English words without vowels",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Initialism of energy."
      ],
      "links": [
        [
          "energy",
          "energy#English"
        ]
      ],
      "raw_glosses": [
        "(slang) Initialism of energy."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism",
        "no-plural",
        "slang"
      ]
    }
  ],
  "word": "NRG"
}