"fourth gear" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "en quatrième vitesse"
      },
      "expansion": "French en quatrième vitesse",
      "name": "cog"
    }
  ],
  "etymology_text": "Originally the highest gear that a car could achieve; compare French en quatrième vitesse.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "fourth gear (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "84 16",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2009, Madhu Jain, The Kapoors: The First Family of Indian Cinema, page 243",
          "text": "During the seventies, Shashi Kapoor went into fourth gear in Bollywood, while Merchant and Ivory made a slew of films, many of which were not set in India.",
          "type": "quotation"
        },
        {
          "ref": "2014, Paul Monette, The Gold Diggers: A Novel",
          "text": "After all, he did the very same thing, pool and lunch, every Friday afternoon for five months—Friday perfect because it gave his cock a rest before the weekend, when it went into fourth gear.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Full throttle; a maximal level of effort."
      ],
      "id": "en-fourth_gear-en-noun-4ls9H0sS",
      "links": [
        [
          "Full throttle",
          "full throttle"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Full throttle; a maximal level of effort."
      ],
      "tags": [
        "idiomatic",
        "uncountable"
      ]
    },
    {
      "glosses": [
        "Used other than figuratively or idiomatically: see fourth, gear."
      ],
      "id": "en-fourth_gear-en-noun-ZY7UhLXF",
      "links": [
        [
          "fourth",
          "fourth#English"
        ],
        [
          "gear",
          "gear#English"
        ]
      ],
      "related": [
        {
          "_dis1": "8 92",
          "word": "second gear"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "fourth gear"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English uncountable nouns"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "en quatrième vitesse"
      },
      "expansion": "French en quatrième vitesse",
      "name": "cog"
    }
  ],
  "etymology_text": "Originally the highest gear that a car could achieve; compare French en quatrième vitesse.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "fourth gear (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "second gear"
    }
  ],
  "senses": [
    {
      "categories": [
        "English idioms",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2009, Madhu Jain, The Kapoors: The First Family of Indian Cinema, page 243",
          "text": "During the seventies, Shashi Kapoor went into fourth gear in Bollywood, while Merchant and Ivory made a slew of films, many of which were not set in India.",
          "type": "quotation"
        },
        {
          "ref": "2014, Paul Monette, The Gold Diggers: A Novel",
          "text": "After all, he did the very same thing, pool and lunch, every Friday afternoon for five months—Friday perfect because it gave his cock a rest before the weekend, when it went into fourth gear.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Full throttle; a maximal level of effort."
      ],
      "links": [
        [
          "Full throttle",
          "full throttle"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) Full throttle; a maximal level of effort."
      ],
      "tags": [
        "idiomatic",
        "uncountable"
      ]
    },
    {
      "glosses": [
        "Used other than figuratively or idiomatically: see fourth, gear."
      ],
      "links": [
        [
          "fourth",
          "fourth#English"
        ],
        [
          "gear",
          "gear#English"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "fourth gear"
}