"on a dime" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase"
      },
      "expansion": "on a dime",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "This boat can turn on a dime."
        },
        {
          "text": "This car has excellent brakes that will stop it on a dime."
        }
      ],
      "glosses": [
        "Within a very short distance; especially, with agile precision in a very small space and suddenly."
      ],
      "id": "en-on_a_dime-en-prep_phrase-~hNmtcNR",
      "links": [
        [
          "precision",
          "precision"
        ]
      ],
      "raw_glosses": [
        "(US) Within a very short distance; especially, with agile precision in a very small space and suddenly."
      ],
      "related": [
        {
          "word": "on the dot"
        }
      ],
      "synonyms": [
        {
          "word": "on a sixpence UK"
        }
      ],
      "tags": [
        "US"
      ],
      "translations": [
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "within a very short distance",
          "word": "por el canto de un duro"
        }
      ]
    }
  ],
  "word": "on a dime"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase"
      },
      "expansion": "on a dime",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "related": [
    {
      "word": "on the dot"
    }
  ],
  "senses": [
    {
      "categories": [
        "American English",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English prepositional phrases"
      ],
      "examples": [
        {
          "text": "This boat can turn on a dime."
        },
        {
          "text": "This car has excellent brakes that will stop it on a dime."
        }
      ],
      "glosses": [
        "Within a very short distance; especially, with agile precision in a very small space and suddenly."
      ],
      "links": [
        [
          "precision",
          "precision"
        ]
      ],
      "raw_glosses": [
        "(US) Within a very short distance; especially, with agile precision in a very small space and suddenly."
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "on a sixpence UK"
    }
  ],
  "translations": [
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "within a very short distance",
      "word": "por el canto de un duro"
    }
  ],
  "word": "on a dime"
}