step function

American  

noun

Mathematics.

1. a function that is constant on each of a finite set of subintervals of its domain, the union of the subintervals being the domain.

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step function British  

noun

1. an electrical waveform that rises or falls instantly from one level to another

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Etymology

Origin of step function

First recorded in 1925–30

Example Sentences

“The scale of assuming they get the $1.5 trillion, that is a step function change,” McGinn explained.

From Salon • May 8, 2026

“I would say it’s a step function every nine months and probably completely resolved in four years.”

From The Wall Street Journal • Apr. 24, 2026

“For AI to to see the step function change in productivity, there has to be a benefit to the end user.”

From MarketWatch • Feb. 7, 2026

That’s autonomy and that’s the key step function value.

From The Verge • Mar. 2, 2021

If you decide that you want more power and flexibility while filming, the Inspire feels like the perfect second unit, a step function that will open up new horizons.

From The Verge • Feb. 10, 2015