# Heaviside unit function

> English word · Noun

## Definitions
1. The function whose value is zero if its independent variable is negative, and one otherwise.

## Etymology
Named after Oliver Heaviside.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/heaviside-unit-function