"step-down" meaning in English

{
  "antonyms": [
    {
      "word": "step-up"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "step down"
      },
      "expansion": "Deverbal from step down",
      "name": "deverbal"
    }
  ],
  "etymology_text": "Deverbal from step down.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "step-down (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "_dis1": "0 0",
      "word": "step-off"
    },
    {
      "_dis1": "0 0",
      "word": "step down"
    }
  ],
  "senses": [
    {
      "glosses": [
        "That decreases in stages."
      ],
      "id": "en-step-down-en-adj-ZQVdZYw-",
      "links": [
        [
          "decrease",
          "decrease"
        ],
        [
          "stage",
          "stage"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    },
    {
      "categories": [
        {
          "_dis": "30 70",
          "kind": "other",
          "name": "English deverbals",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "15 85",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "28 72",
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "24 76",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "10 90",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "25 75",
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "25 75",
          "kind": "other",
          "name": "Terms with Vietnamese translations",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              209,
              218
            ]
          ],
          "ref": "1958 September 30, “Swindon's First Main-Line Diesel Locomotive”, in Railway Magazine, page 604:",
          "text": "The internal lighting of the new locomotives can be supplied either from the battery or the dynostarter, and may also be connected to an external supply of 200-250 volts a.c. through a changeover switch and a step-down transformer.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "That reduces a voltage."
      ],
      "id": "en-step-down-en-adj-YOhZd4rR",
      "links": [
        [
          "voltage",
          "voltage"
        ]
      ],
      "raw_glosses": [
        "(of a transformer etc.) That reduces a voltage."
      ],
      "raw_tags": [
        "of a transformer etc."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "translations": [
    {
      "_dis1": "50 50",
      "code": "fi",
      "lang": "Finnish",
      "lang_code": "fi",
      "sense": "voltage decrease",
      "word": "jännitettä laskeva"
    },
    {
      "_dis1": "50 50",
      "code": "vi",
      "lang": "Vietnamese",
      "lang_code": "vi",
      "sense": "voltage decrease",
      "word": "hạ thế"
    }
  ],
  "word": "step-down"
}

{
  "antonyms": [
    {
      "word": "step-up"
    }
  ],
  "categories": [
    "English adjectives",
    "English deverbals",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English uncomparable adjectives",
    "Entries with translation boxes",
    "Pages with 1 entry",
    "Pages with entries",
    "Terms with Finnish translations",
    "Terms with Vietnamese translations"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "step down"
      },
      "expansion": "Deverbal from step down",
      "name": "deverbal"
    }
  ],
  "etymology_text": "Deverbal from step down.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "step-down (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "step-off"
    },
    {
      "word": "step down"
    }
  ],
  "senses": [
    {
      "glosses": [
        "That decreases in stages."
      ],
      "links": [
        [
          "decrease",
          "decrease"
        ],
        [
          "stage",
          "stage"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    },
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              209,
              218
            ]
          ],
          "ref": "1958 September 30, “Swindon's First Main-Line Diesel Locomotive”, in Railway Magazine, page 604:",
          "text": "The internal lighting of the new locomotives can be supplied either from the battery or the dynostarter, and may also be connected to an external supply of 200-250 volts a.c. through a changeover switch and a step-down transformer.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "That reduces a voltage."
      ],
      "links": [
        [
          "voltage",
          "voltage"
        ]
      ],
      "raw_glosses": [
        "(of a transformer etc.) That reduces a voltage."
      ],
      "raw_tags": [
        "of a transformer etc."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "lang_code": "fi",
      "sense": "voltage decrease",
      "word": "jännitettä laskeva"
    },
    {
      "code": "vi",
      "lang": "Vietnamese",
      "lang_code": "vi",
      "sense": "voltage decrease",
      "word": "hạ thế"
    }
  ],
  "word": "step-down"
}