"2G" meaning in English

{
  "head_templates": [
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        "2": "adjective"
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      "expansion": "2G",
      "name": "head"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
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          "name": "English retronyms",
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        {
          "kind": "other",
          "langcode": "en",
          "name": "Mobile phones",
          "orig": "en:Mobile phones",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              127,
              129
            ]
          ],
          "ref": "2025 October 1, Paul Clifton, “Reaching out for superfast WiFi”, in RAIL, number 1045, page 50:",
          "text": "The entire rail network has long operated its own masts, used for communicating with drivers. But they are largely GSM. That's 2G to us -yesterday's tech.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Referring to standards before 2.5G. Includes GSM, DMA, TDMA, iDEN, and PDC."
      ],
      "hyponyms": [
        {
          "word": "cdmaOne"
        },
        {
          "word": "D-AMPS"
        },
        {
          "word": "GSM"
        },
        {
          "word": "iDEN"
        },
        {
          "word": "IS-136"
        },
        {
          "word": "IS-95"
        },
        {
          "word": "JDC"
        },
        {
          "word": "PDC"
        }
      ],
      "id": "en-2G-en-adj-ZVECcwfs",
      "links": [
        [
          "mobile telephony",
          "mobile telephone"
        ],
        [
          "2.5G",
          "2.5G#English"
        ],
        [
          "GSM",
          "GSM#English"
        ],
        [
          "DMA",
          "DMA#English"
        ],
        [
          "TDMA",
          "TDMA#English"
        ],
        [
          "iDEN",
          "iDEN#English"
        ],
        [
          "PDC",
          "PDC#English"
        ]
      ],
      "raw_glosses": [
        "(mobile telephony, retronym) Referring to standards before 2.5G. Includes GSM, DMA, TDMA, iDEN, and PDC."
      ],
      "related": [
        {
          "word": "0G"
        },
        {
          "word": "1G"
        },
        {
          "word": "2.5G"
        },
        {
          "word": "2.75G"
        },
        {
          "word": "3G"
        },
        {
          "word": "3G+"
        },
        {
          "word": "4G"
        },
        {
          "word": "5G"
        }
      ],
      "tags": [
        "retronym"
      ],
      "topics": [
        "communications",
        "electrical-engineering",
        "engineering",
        "mobile-telephony",
        "natural-sciences",
        "physical-sciences",
        "telecommunications",
        "telephony"
      ]
    }
  ],
  "word": "2G"
}

{
  "head_templates": [
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      "args": {
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        "2": "adjective"
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      "expansion": "2G",
      "name": "head"
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  ],
  "hyponyms": [
    {
      "word": "cdmaOne"
    },
    {
      "word": "D-AMPS"
    },
    {
      "word": "GSM"
    },
    {
      "word": "iDEN"
    },
    {
      "word": "IS-136"
    },
    {
      "word": "IS-95"
    },
    {
      "word": "JDC"
    },
    {
      "word": "PDC"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "0G"
    },
    {
      "word": "1G"
    },
    {
      "word": "2.5G"
    },
    {
      "word": "2.75G"
    },
    {
      "word": "3G"
    },
    {
      "word": "3G+"
    },
    {
      "word": "4G"
    },
    {
      "word": "5G"
    }
  ],
  "senses": [
    {
      "categories": [
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        "English entries with incorrect language header",
        "English lemmas",
        "English retronyms",
        "English terms spelled with numbers",
        "English terms with quotations",
        "Pages with 2 entries",
        "Pages with entries",
        "en:Mobile phones"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              127,
              129
            ]
          ],
          "ref": "2025 October 1, Paul Clifton, “Reaching out for superfast WiFi”, in RAIL, number 1045, page 50:",
          "text": "The entire rail network has long operated its own masts, used for communicating with drivers. But they are largely GSM. That's 2G to us -yesterday's tech.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Referring to standards before 2.5G. Includes GSM, DMA, TDMA, iDEN, and PDC."
      ],
      "links": [
        [
          "mobile telephony",
          "mobile telephone"
        ],
        [
          "2.5G",
          "2.5G#English"
        ],
        [
          "GSM",
          "GSM#English"
        ],
        [
          "DMA",
          "DMA#English"
        ],
        [
          "TDMA",
          "TDMA#English"
        ],
        [
          "iDEN",
          "iDEN#English"
        ],
        [
          "PDC",
          "PDC#English"
        ]
      ],
      "raw_glosses": [
        "(mobile telephony, retronym) Referring to standards before 2.5G. Includes GSM, DMA, TDMA, iDEN, and PDC."
      ],
      "tags": [
        "retronym"
      ],
      "topics": [
        "communications",
        "electrical-engineering",
        "engineering",
        "mobile-telephony",
        "natural-sciences",
        "physical-sciences",
        "telecommunications",
        "telephony"
      ]
    }
  ],
  "word": "2G"
}