isn't

American  

[iz-uhnt] / ˈɪz ənt /

1. contraction of is not.

---

isn't British  

/ ˈɪzənt /

contraction

1. is not

---

Pronunciation

Isn't is often pronounced in the South Midland and Southern U.S., with , a stop consonant, substituting for , a sibilant. This substitution results from an assimilatory process in which the tip of the tongue, in anticipation of the articulatory position for the following , touches the upper alveolar ridge. This same process gives for wasn't and for business. These pronunciations are heard from speakers on all social levels.

Usage

See contraction.

Example Sentences

Quantum isn’t expected to outright replace the infrastructure that has been around for decades, but integrate with it, resulting is so-called hybrid computing that blends the capabilities of both types of technology.

From Barron's

The technology isn’t quite there yet and errors only increase as developers scale to larger quantum systems.

From Barron's

It’s a reminder that the technology has real-world applications and isn’t purely aspirational as it was thought to be just years ago.

From Barron's

The Brazilians were happy to have him—even though Contreras still isn’t old enough to vote.

From The Wall Street Journal

Metal prices are disproportionately hurt by knocks to global growth, a risk that isn’t properly reflected in the sectors’ stock prices, they add.

From The Wall Street Journal