- effecting an increase.
- Electricity. serving to increase voltage: a step-up transformer.
- (of a lease) allowing for gradual rent increases to the highest amount permissible.
- an increase or rise in the rate or quantity of something.
Origin of step-up
First recorded in 1890–95; adj., noun use of verb phrase step up
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for step-up
The former is called "step-up" while the latter is a "step-down" transformer.Physics
Willis Eugene Tower
Barely touched 'em—current something less than a thousandth of a micro-ampere on a million to one step-up.Skylark Three
Edward Elmer Smith
It was attached to a step-up transformer that converted the current to 230 volts.
The transformation from a relatively low voltage to the high one is effected by means of what is called a step-up transformer.Every-day Science: Volume VI. The Conquest of Nature
Henry Smith Williams