adjective Electricity.

serving to reduce or decrease voltage: a step-down transformer.

Origin of step-down

First recorded in 1890–95; adj. use of verb phrase step down Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for step-down

Historical Examples of step-down

  • The former is called "step-up" while the latter is a "step-down" transformer.


    Willis Eugene Tower

  • When the current reaches those places where it is to be used a low voltage is again obtained by the step-down transformer.

    The Niagara River

    Archer Butler Hulbert

  • If the pressure or voltage of the secondary coil is less than that of the primary, we have a "step-down" transformer.

    The Story of Great Inventions

    Elmer Ellsworth Burns

  • When used on modern supply circuits of 220 volts a number of lamps may be run in series, or a step-down transformer employed.

  • For accurate results a step-down voltmeter transformer should be used on the testing circuit.