"ultra-fast" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ultra-",
        "3": "fast"
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      "expansion": "ultra- + fast",
      "name": "af"
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  ],
  "etymology_text": "From ultra- + fast.",
  "head_templates": [
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      "args": {
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      "expansion": "ultra-fast (not comparable)",
      "name": "en-adj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "ultrafast"
        }
      ],
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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          "parents": [],
          "source": "w"
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          "parents": [],
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      "examples": [
        {
          "ref": "1960 February, “Talking of Trains”, in Trains Illustrated, page 67:",
          "text": "Less important lines of plain double track carrying a mixture of passenger and freight traffic cannot be given ultra-fast expresses, and where alternative routes exist, as for example between London and the West Riding, the specially high-speed trains must be restricted to one of them only.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of ultrafast"
      ],
      "id": "en-ultra-fast-en-adj-4pMg7KxX",
      "links": [
        [
          "ultrafast",
          "ultrafast#English"
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        "alt-of",
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        "not-comparable"
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    }
  ],
  "word": "ultra-fast"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ultra-",
        "3": "fast"
      },
      "expansion": "ultra- + fast",
      "name": "af"
    }
  ],
  "etymology_text": "From ultra- + fast.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "ultra-fast (not comparable)",
      "name": "en-adj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "ultrafast"
        }
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        "English lemmas",
        "English multiword terms",
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        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1960 February, “Talking of Trains”, in Trains Illustrated, page 67:",
          "text": "Less important lines of plain double track carrying a mixture of passenger and freight traffic cannot be given ultra-fast expresses, and where alternative routes exist, as for example between London and the West Riding, the specially high-speed trains must be restricted to one of them only.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of ultrafast"
      ],
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          "ultrafast",
          "ultrafast#English"
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  "word": "ultra-fast"
}