# heat index

> English word · Noun

## Definitions
1. A figure used by American meteorologists to describe the apparent heat felt by a person as the result of a combination of temperature and humidity.

## Etymology
From heat + index.

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